/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * The contents of this file are subject to the Netscape Public License * Version 1.0 (the "NPL"); you may not use this file except in * compliance with the NPL. You may obtain a copy of the NPL at * http://www.mozilla.org/NPL/ * * Software distributed under the NPL is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL * for the specific language governing rights and limitations under the * NPL. * * The Initial Developer of this code under the NPL is Netscape * Communications Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All Rights * Reserved. */ /* Module to do memory caching; storage and retreival * very simple hash table based scheme. * * designed and originally implemented by Lou Montulli * modifications/additions by Gagan Saksena */ /* Please leave outside of ifdef for windows precompiled headers */ #include "rosetta.h" #include "xp.h" #ifdef MOZILLA_CLIENT #include "mkcache.h" #include "mkselect.h" #include "netutils.h" #include "mktcp.h" #include "glhist.h" #include "xp_hash.h" #include "xp_mcom.h" #include "client.h" #include "mkgeturl.h" #include "mkstream.h" #include "extcache.h" #include "mkmemcac.h" extern void IL_SetCacheSize(uint32 new_size); #include "prclist.h" #include "prmem.h" #include "plstr.h" #include "shist.h" #include "secnav.h" #include "timing.h" #ifdef NU_CACHE #include "CacheStubs.h" #endif /* exported error ints */ extern int MK_OUT_OF_MEMORY; /* the size of the cache segment output size */ #define NET_MEM_CACHE_OUTPUT_SIZE 2048 /* MAX_MEMORY_ALLOC_SIZE is the size of the largest malloc * used in this module * * the NET_Socket_Buffer can never be larger than the * MAX_MEMORY_ALLOC_SIZE or this will fail */ #ifdef XP_WIN16 #define MAX_MEMORY_ALLOC_SIZE 32767 /* MAXINT */ #elif defined(XP_MAC) #define MAX_MEMORY_ALLOC_SIZE 64*1024 #else #define MAX_MEMORY_ALLOC_SIZE (((unsigned) (~0) << 1) >> 1) /* MAXINT */ /* @@@@@@@@@ there is currently a limit on PR_Malloc to less than 32 K */ #undef MAX_MEMORY_ALLOC_SIZE #define MAX_MEMORY_ALLOC_SIZE 32767 /* MAXINT */ #endif /* this is the minimum size of each of the memory segments used to hold * the cache object in memory */ #ifdef XP_MAC #define MEMORY_CACHE_SEGMENT_SIZE 64*1024 #else #define MEMORY_CACHE_SEGMENT_SIZE 2048 #endif /* !!! structure is typedef'd to net_MemoryCacheObject * in net.h */ struct _net_MemoryCacheObject { XP_List *list; net_CacheObject cache_obj; int external_locks; /* locks set by other modules calling in */ int mem_read_lock; /* the number of current readers */ XP_Bool delete_me; /* set this to delete the object * once all readers are done */ XP_Bool current_page_only; /* this is set when the document * requested not to be cached. * When set the document should * only be served if it's a * resize or print */ XP_Bool completed; /* whether or not we have completed the * caching of this object. Initialized to * false, then set to true once the * complete function is called. */ XP_Bool aborted; /* whether or not we have aborted the * caching of this object. */ }; /* structure to hold memory * segments */ typedef struct _net_MemorySegment { char *segment; uint32 seg_size; uint32 in_use; } net_MemorySegment; /* the hash table pointer that holds all the memory cache * objects for quick lookup */ PRIVATE XP_HashList * net_MemoryCacheHashList = 0; /* semaphore counter set when calling any of the list add functions */ PRIVATE int net_cache_adding_object=0; /* a list of all the documents currently in * memory * * The net_MemoryCacheList is used as a delete queue * and is ordered by last-accessed time. */ PRIVATE XP_List *net_MemoryCacheList=0; PRIVATE uint32 net_MemoryCacheSize=0; PRIVATE uint32 net_MaxMemoryCacheSize=0; /* this object is used by the MemCacheConverter. * MemCacheConverter is a standard netlib stream and uses * this structure to hold data between invokations of * the write function and complete or abort. */ typedef struct _CacheDataObject { PRCList links; NET_StreamClass *next_stream; net_MemoryCacheObject *memory_copy; URL_Struct *URL_s; uint32 computed_content_length; } CacheDataObject; /* PRIVATE XXX Mac CodeWarrior bug */ PRCList mem_active_cache_data_objects = PR_INIT_STATIC_CLIST(&mem_active_cache_data_objects); /* free a segmented memory copy of an object * and the included net_cacheObject struct */ PRIVATE void net_FreeMemoryCopy(net_MemoryCacheObject * mem_copy) { net_MemorySegment * mem_seg; PR_ASSERT(mem_copy); if(!mem_copy) return; /* If the stream was aborted while being written, and nobody is * reading it, then it's ok to delete it now. That is, * we don't need to check if we want to set delete_me */ if (!((mem_copy->mem_read_lock == 0) && mem_copy->aborted)) { /* if this object is currently being read or written DO NOT delete it. * It will be deleted by another call to this function * after it is finished being read. */ if (((mem_copy->mem_read_lock > 0) && mem_copy->completed) || !mem_copy->completed) { TRACEMSG(("Seting delete_me flag on memory cache object")); mem_copy->delete_me = TRUE; /* remove it from the hash list so it won't be found * by NET_GetURLInMemCache */ XP_HashListRemoveObject(net_MemoryCacheHashList, mem_copy); return; } } TRACEMSG(("Freeing memory cache copy")); /* free and delete the memory segment list */ while((mem_seg = (net_MemorySegment *)XP_ListRemoveTopObject(mem_copy->list)) != NULL) { /* reduce the global memory cache size */ net_MemoryCacheSize -= mem_seg->seg_size; PR_Free(mem_seg->segment); PR_Free(mem_seg); } XP_ListDestroy(mem_copy->list); /* Remove it from the hash and delete lists, * If the object isn't in these lists anymore * the call will be ignored. */ XP_HashListRemoveObject(net_MemoryCacheHashList, mem_copy); XP_ListRemoveObject(net_MemoryCacheList, mem_copy); PR_FREEIF(mem_copy->cache_obj.address); PR_FREEIF(mem_copy->cache_obj.post_data); PR_FREEIF(mem_copy->cache_obj.post_headers); PR_FREEIF(mem_copy->cache_obj.content_type); PR_FREEIF(mem_copy->cache_obj.charset); PR_FREEIF(mem_copy->cache_obj.content_encoding); PR_Free(mem_copy); } /* removes the last mem object. Returns negative on error, * otherwise returns the current size of the cache */ PRIVATE int32 net_remove_last_memory_cache_object(void) { net_MemoryCacheObject * mem_cache_obj; /* safty valve in case there are no list items * or if we are in the process of adding an object */ if(net_cache_adding_object) return -1; mem_cache_obj = (net_MemoryCacheObject *) XP_ListRemoveEndObject(net_MemoryCacheList); if(!mem_cache_obj) return -1; /* we can't remove it if we have external locks or if it's not completed - * try removing another one */ if(mem_cache_obj->external_locks || !mem_cache_obj->completed) { int status = net_remove_last_memory_cache_object(); /* recurse */ /* add the object back in */ XP_ListAddObject(net_MemoryCacheList, mem_cache_obj); return status; } net_FreeMemoryCopy(mem_cache_obj); return((int32) net_MemoryCacheSize); } /* this function free's objects to bring the cache size * below the size passed in */ PRIVATE void net_ReduceMemoryCacheTo(uint32 size) { /* safty valve in case we are in the process of adding an object */ if(net_cache_adding_object) return; while(net_MemoryCacheSize > size) { if(0 > net_remove_last_memory_cache_object()) break; } } /* set the size of the Memory cache. * Set it to 0 if you want cacheing turned off * completely */ #define HTML_CACHE_MAX_BASE_SIZE 1024l*1024l #define HTML_CACHE_VARIABLE_GROWTH .05 /* the percentage to add */ PUBLIC void NET_SetMemoryCacheSize(int32 new_size) { int32 image_cache_size; int32 html_cache_size; if(new_size <= 0) { IL_SetCacheSize(0); net_ReduceMemoryCacheTo(0); net_MaxMemoryCacheSize = 0; return; } /* the netlib mem cache is set to .3*new_size * or 200K + .05 * new_size, whichever is less. * and imagelb uses the rest */ if(new_size * .3 < HTML_CACHE_MAX_BASE_SIZE) { /* use .3 of new_size */ html_cache_size = (int32) (.3 * new_size); } else { /* use HTML_CACHE_MAX_BASE_SIZE + .05*new_size */ html_cache_size = HTML_CACHE_MAX_BASE_SIZE + (int32)(HTML_CACHE_VARIABLE_GROWTH* (new_size - HTML_CACHE_MAX_BASE_SIZE)); } image_cache_size = new_size - html_cache_size; net_MaxMemoryCacheSize = html_cache_size; net_ReduceMemoryCacheTo((uint32) html_cache_size); /* set the image cache to be the rest */ IL_SetCacheSize(image_cache_size); return; } /* Remove the last memory cache object if one exists * Returns the total size of the memory cache in bytes * after performing the operation */ PUBLIC int32 NET_RemoveLastMemoryCacheObject() { net_remove_last_memory_cache_object(); return(net_MemoryCacheSize); } /* returns the number of bytes currently in use by the Memory cache */ PUBLIC int32 NET_GetMemoryCacheSize() { return(net_MemoryCacheSize); } PUBLIC int32 NET_GetMaxMemoryCacheSize() { return net_MaxMemoryCacheSize; } /* compare entries for the hashing functions * * return 0 if match or positive or negative on * non match */ PRIVATE int net_CacheHashComp(net_MemoryCacheObject * obj1, net_MemoryCacheObject * obj2) { int result; char *hash1; char *hash2; char *ques1=0; char *ques2=0; char *ques3=0; char *ques4=0; if(obj1->cache_obj.method != obj2->cache_obj.method) return(obj1->cache_obj.method - obj2->cache_obj.method); /* If this is a "news:" or "snews:" URL, then any search data in the URL * (the stuff after '?') should be ignored for cache-comparison purposes, * so that "news:MSGID" and "news:MSGID?headers=all" share the same cache * file. */ if((NET_TO_UPPER(obj1->cache_obj.address[0]) == 'N' || NET_TO_UPPER(obj1->cache_obj.address[0]) == 'S') && NET_URL_Type(obj1->cache_obj.address) == NEWS_TYPE_URL) { ques1 = PL_strchr(obj1->cache_obj.address, '?'); if(ques1) *ques1 = '\0'; } if((NET_TO_UPPER(obj2->cache_obj.address[0]) == 'N' || NET_TO_UPPER(obj2->cache_obj.address[0]) == 'S') && NET_URL_Type(obj2->cache_obj.address) == NEWS_TYPE_URL) { ques2 = PL_strchr(obj2->cache_obj.address, '?'); if(ques2) *ques2 = '\0'; } /* do the same for IMAP */ if(!PL_strncasecmp(obj1->cache_obj.address,"mailbox://",10)) { ques3 = PL_strstr(obj1->cache_obj.address, "&part="); if(ques3) *ques3 = '\0'; } if(!PL_strncasecmp(obj2->cache_obj.address,"mailbox://",10)) { ques4 = PL_strstr(obj2->cache_obj.address, "&part="); if(ques4) *ques4 = '\0'; } /* strip hash symbols because they * really represent the same * document */ hash1 = PL_strchr(obj1->cache_obj.address, '#'); hash2 = PL_strchr(obj2->cache_obj.address, '#'); if(hash1) *hash1 = '\0'; if(hash2) *hash2 = '\0'; result = PL_strcmp(obj1->cache_obj.address, obj2->cache_obj.address); /* set them back to previous values */ if(hash1) *hash1 = '#'; if(hash2) *hash2 = '#'; if(ques1) *ques1 = '?'; if(ques2) *ques2 = '?'; if(ques3) *ques3 = '&'; if(ques4) *ques4 = '&'; if(result != 0) return(result); if(!obj1->cache_obj.post_data && !obj2->cache_obj.post_data) return(0); /* match; no post data on either */ if(obj1->cache_obj.post_data && obj2->cache_obj.post_data) { result = PL_strcmp(obj1->cache_obj.post_data, obj2->cache_obj.post_data); return(result); } else { /* one but not the other */ if(obj1->cache_obj.post_data) return(1); else return(-1); } return(0); /* match with post data */ } /* hashing function for url's * * This is some magic Jamie gave me... */ PRIVATE uint32 net_CacheHashFunc(net_MemoryCacheObject * obj1) { unsigned const char *x; uint32 h = 0; uint32 g; XP_Bool news_type_url = FALSE; XP_Bool imap_type_url = FALSE; if(!obj1) return 0; x = (unsigned const char *) obj1->cache_obj.address; /* figure out if it's a news type URL */ if((NET_TO_UPPER(obj1->cache_obj.address[0]) == 'N' || NET_TO_UPPER(obj1->cache_obj.address[0]) == 'S') && NET_URL_Type(obj1->cache_obj.address) == NEWS_TYPE_URL) news_type_url = TRUE; /* figure out if it's an IMAP type URL */ else if (NET_TO_UPPER(obj1->cache_obj.address[0]) == 'M' && !PL_strncasecmp(obj1->cache_obj.address,"Mailbox://",10)) imap_type_url = TRUE; /* modify the default String hash function * to work with URL's */ assert(x); if (!x) return 0; /* ignore '#' data for all URL's. * ignore '?' data for news URL's * ignore '&' data for all IMAP URL's */ while (*x != 0 && *x != '#' && (!news_type_url || *x != '?') && (!imap_type_url || *x != '&')) { h = (h << 4) + *x++; if ((g = h & 0xf0000000) != 0) h = (h ^ (g >> 24)) ^ g; } return h; } /****************************************************************** * Cache Converter Stream input routines */ /* is the stream ready for writing? */ PRIVATE unsigned int net_MemCacheWriteReady (NET_StreamClass *stream) { CacheDataObject *obj=stream->data_object; if(obj->next_stream) return((*obj->next_stream->is_write_ready)(obj->next_stream)); else return(MAX_WRITE_READY); } /* stream write function * * this function accepts a stream and writes the data * into memory segments on a segment list. */ PRIVATE int net_MemCacheWrite (NET_StreamClass *stream, CONST char* buffer, int32 len) { CacheDataObject *obj=stream->data_object; TRACEMSG(("net_MemCacheWrite called with %ld buffer size", len)); /* if delete_me is set, we don't want to keep writing to the memcache stream. */ if(obj->memory_copy && !obj->memory_copy->delete_me) { net_MemorySegment * mem_seg; char * cur_mem_seg_ptr; /* compute a content_length as we read data * to use as a comparison and for URL's that * don't send a content type */ obj->computed_content_length += len; /* we are always adding to the end one in the list so * lets get it */ mem_seg = (net_MemorySegment *) XP_ListGetEndObject(obj->memory_copy->list); PR_ASSERT(mem_seg); if(mem_seg->in_use+len > mem_seg->seg_size) { /* we need a new segment */ net_MemorySegment * new_mem_seg = PR_NEW(net_MemorySegment); uint32 size_left_in_old_buffer = mem_seg->seg_size - mem_seg->in_use; uint32 size_for_new_buffer = len - size_left_in_old_buffer; char * new_mem_seg_ptr; if(!new_mem_seg) { net_FreeMemoryCopy(obj->memory_copy); obj->memory_copy = 0; goto EndOfMemWrite; } /* @@@ the socket buffer can never be larger * than the MAX_MEMORY_ALLOC_SIZE */ if(size_for_new_buffer > MEMORY_CACHE_SEGMENT_SIZE) { new_mem_seg->segment = (char*)PR_Malloc(size_for_new_buffer); new_mem_seg->seg_size = size_for_new_buffer; } else { new_mem_seg->segment = (char*)PR_Malloc( MEMORY_CACHE_SEGMENT_SIZE); new_mem_seg->seg_size = MEMORY_CACHE_SEGMENT_SIZE; } if(!new_mem_seg->segment) { PR_Free(new_mem_seg); net_FreeMemoryCopy(obj->memory_copy); obj->memory_copy = 0; goto EndOfMemWrite; } /* increase the global cache size counter */ net_MemoryCacheSize += new_mem_seg->seg_size; TRACEMSG(("Cache size now: %d", net_MemoryCacheSize)); cur_mem_seg_ptr = mem_seg->segment; new_mem_seg_ptr = new_mem_seg->segment; /* fill in what we can to the old buffer */ if(size_left_in_old_buffer) { memcpy(cur_mem_seg_ptr+mem_seg->in_use, buffer, (size_t) size_left_in_old_buffer); mem_seg->in_use = mem_seg->seg_size; /* seg new size */ } /* fill in the new buffer */ memcpy(new_mem_seg_ptr, buffer+size_left_in_old_buffer, (size_t) size_for_new_buffer); new_mem_seg->in_use = size_for_new_buffer; net_cache_adding_object++; /* semaphore */ XP_ListAddObjectToEnd(obj->memory_copy->list, new_mem_seg); net_cache_adding_object--; /* semaphore */ TRACEMSG(("Adding %d to New memory segment %p", len, new_mem_seg)); } else { assert (mem_seg->segment); cur_mem_seg_ptr = mem_seg->segment; /* fill in some more into the existing segment */ memcpy(cur_mem_seg_ptr + mem_seg->in_use, buffer, (size_t) len); mem_seg->in_use += len; TRACEMSG(("Adding %d to existing memory segment %p", len, mem_seg)); } } EndOfMemWrite: /* target of a goto from an error above */ if(obj->next_stream) { int status=0; PR_ASSERT (buffer); PR_ASSERT (len > -1); status = (*obj->next_stream->put_block) (obj->next_stream, buffer, len); /* abort */ if(status < 0) return(status); } return(1); } /* complete the stream */ PRIVATE void net_MemCacheComplete (NET_StreamClass *stream) { CacheDataObject *obj=stream->data_object; /* refresh these entries in case meta changes them */ if(obj->URL_s && obj->memory_copy) { obj->memory_copy->cache_obj.expires = obj->URL_s->expires; obj->memory_copy->cache_obj.last_modified = obj->URL_s->last_modified; StrAllocCopy(obj->memory_copy->cache_obj.charset, obj->URL_s->charset); } if (obj->memory_copy) { /* now it's completed */ obj->memory_copy->completed = TRUE; /* if the object is zero size or * if the computed size is different that a given content type, * zero the last modified date so that it wont get reused * on a recheck or reload */ if(!obj->computed_content_length || (obj->memory_copy->cache_obj.content_length && obj->memory_copy->cache_obj.content_length != obj->computed_content_length ) ) { obj->memory_copy->cache_obj.last_modified = 0; } /* override the given content_length with the correct * content length */ obj->memory_copy->cache_obj.content_length = obj->computed_content_length; /* set current time */ obj->memory_copy->cache_obj.last_accessed = time(NULL); } /* loser: */ /* complete the next stream */ if(obj->next_stream) { (*obj->next_stream->complete)(obj->next_stream); PR_Free(obj->next_stream); } /* finally, check to see if we want to delete this, after going through all that work just to put it in here. */ if(obj->memory_copy && obj->memory_copy->delete_me && (obj->memory_copy->mem_read_lock == 0)) { net_FreeMemoryCopy(obj->memory_copy); } /* don't need the data obj any more since this is the end * of the stream... */ PR_REMOVE_LINK(&obj->links); PR_Free(obj); /* this is what keeps the cache from growing without end */ net_ReduceMemoryCacheTo(net_MaxMemoryCacheSize); return; } /* add the object into the cache, even if it hasn't been finished getting cached. When it's finished, net_MemCacheComplete will set the obj->memory_copy->comlpleted flag. */ PRIVATE void net_MemCacheAddObjectToCache (CacheDataObject * obj) { int status; /* if the hash table doesn't exist yet, initialize it now */ if(!net_MemoryCacheHashList) { net_MemoryCacheHashList = XP_HashListNew(499, (XP_HashingFunction) net_CacheHashFunc, (XP_HashCompFunction) net_CacheHashComp); if(!net_MemoryCacheHashList) { net_FreeMemoryCopy(obj->memory_copy); goto loser; return; } } /* if the delete list doesn't exist yet, initialize it now */ if(!net_MemoryCacheList) { net_MemoryCacheList = XP_ListNew(); if(!net_MemoryCacheList) { net_FreeMemoryCopy(obj->memory_copy); goto loser; return; } } /* memory copy could have been free'd and clear if an * error occured in the write, so check to make sure * it's still around. */ if(obj->memory_copy) { /* set the completed flag so that we know we're in * the process of caching this object. */ obj->memory_copy->completed = FALSE; obj->memory_copy->aborted = FALSE; /* if the document requested not to be cached, * set the flag to only serve it for reloads and such */ if(obj->URL_s && obj->URL_s->dont_cache) obj->memory_copy->current_page_only = TRUE; /* add the struct to the delete list */ net_cache_adding_object++; /* semaphore */ XP_ListAddObject(net_MemoryCacheList, obj->memory_copy); net_cache_adding_object--; /* semaphore */ /* add the struct to the hash list */ net_cache_adding_object++; /* semaphore */ status = XP_HashListAddObject(net_MemoryCacheHashList, obj->memory_copy); net_cache_adding_object--; /* semaphore */ /* check for hash collision */ if(status == XP_HASH_DUPLICATE_OBJECT) { net_MemoryCacheObject * tmp_obj; tmp_obj = (net_MemoryCacheObject *) XP_HashListFindObject(net_MemoryCacheHashList, obj->memory_copy); if ((tmp_obj->mem_read_lock == 0) && tmp_obj->completed) { /* If there is nobody currently reading or writing the * duplicate hash entry, then free the old copy. * This will remove it from the hash list, also. */ net_FreeMemoryCopy(tmp_obj); TRACEMSG(("Found duplicate object in cache. Removing old object")); /* re add the object */ net_cache_adding_object++; /* semaphore */ XP_HashListAddObject(net_MemoryCacheHashList, obj->memory_copy); net_cache_adding_object--; /* semaphore */ } else { /* We can't cache this entry, the duplicate is * currently being read or written. So delete this entry. */ net_FreeMemoryCopy(obj->memory_copy); } } } loser: return; } /* Abort the stream * */ PRIVATE void net_MemCacheAbort (NET_StreamClass *stream, int status) { CacheDataObject *obj=stream->data_object; /* abort the next stream */ if(obj->next_stream) { (*obj->next_stream->abort)(obj->next_stream, status); PR_Free(obj->next_stream); } /* set the aborted flag so that the object will really be deleted * if there are no read locks. */ obj->memory_copy->aborted = TRUE; net_FreeMemoryCopy(obj->memory_copy); PR_REMOVE_LINK(&obj->links); PR_Free(obj); return; } /* setup the stream */ MODULE_PRIVATE NET_StreamClass * NET_MemCacheConverter (FO_Present_Types format_out, void *converter_obj, URL_Struct *URL_s, MWContext *window_id) { CacheDataObject * data_object=0; NET_StreamClass * stream=0; net_MemorySegment * mem_seg=0; net_MemoryCacheObject *memory_copy=0; net_MemCacheConverterObject *mem_conv_obj = converter_obj; TRACEMSG(("Setting up cache stream. Have URL: %s\n", URL_s->address)); TRACEMSG(("Setting up memory cache")); /* check to see if the object is larger than the * size of the max memory cache * * skip the size check if the must_cache flag is set. */ if(!URL_s->must_cache && (uint32)URL_s->content_length >= net_MaxMemoryCacheSize) goto malloc_failure; /* dont cache this URL */ /* set up the memory caching struct. * * malloc the segment first since it's the most likely malloc to fail */ mem_seg = PR_NEW(net_MemorySegment); if(!mem_seg) return(NULL); mem_seg->in_use = 0; if(URL_s->content_length > 0) { /* use the content_length if we can since that would be * the most efficient */ if(URL_s->content_length > MAX_MEMORY_ALLOC_SIZE) { mem_seg->segment = (char*)PR_Malloc(MAX_MEMORY_ALLOC_SIZE); mem_seg->seg_size = MAX_MEMORY_ALLOC_SIZE; } else { /* add 10 just in case it's needed due to a bad content type :) */ mem_seg->segment = (char*)PR_Malloc(URL_s->content_length+10); mem_seg->seg_size = URL_s->content_length+10; } } else { /* this is a case of no content length, use standard size segments */ mem_seg->segment = (char*)PR_Malloc(MEMORY_CACHE_SEGMENT_SIZE); mem_seg->seg_size = MEMORY_CACHE_SEGMENT_SIZE; } if(!mem_seg->segment) { PR_Free(mem_seg); goto malloc_failure; /* skip memory cacheing */ } /* malloc the main cache holding structure */ memory_copy = PR_NEW(net_MemoryCacheObject); if(!memory_copy) { PR_Free(mem_seg); PR_Free(mem_seg->segment); goto malloc_failure; /* skip memory cacheing */ } memset(memory_copy, 0, sizeof(net_MemoryCacheObject)); memory_copy->list = XP_ListNew(); if(!memory_copy->list) { PR_Free(mem_seg); PR_Free(mem_seg->segment); PR_Free(memory_copy); goto malloc_failure; /* skip memory cacheing */ } /* if we get this far add the object to the size count * since if we fail anywhere below here it will get * subtracted by net_FreeMemoryCopy(memory_copy); */ net_MemoryCacheSize += mem_seg->seg_size; /* add the segment malloced above to the segment list */ net_cache_adding_object++; /* semaphore */ XP_ListAddObject(memory_copy->list, mem_seg); net_cache_adding_object--; /* semaphore */ StrAllocCopy(memory_copy->cache_obj.address, URL_s->address); memory_copy->cache_obj.method = URL_s->method; if(URL_s->post_data) { memory_copy->cache_obj.post_data_size = URL_s->post_data_size; StrAllocCopy(memory_copy->cache_obj.post_data, URL_s->post_data); StrAllocCopy(memory_copy->cache_obj.post_headers, URL_s->post_headers); } memory_copy->cache_obj.expires = URL_s->expires; memory_copy->cache_obj.last_modified = URL_s->last_modified; memory_copy->cache_obj.content_length = URL_s->content_length; memory_copy->cache_obj.real_content_length = URL_s->content_length; memory_copy->cache_obj.is_netsite = URL_s->is_netsite; StrAllocCopy(memory_copy->cache_obj.content_type, URL_s->content_type); StrAllocCopy(memory_copy->cache_obj.charset, URL_s->charset); StrAllocCopy(memory_copy->cache_obj.content_encoding, URL_s->content_encoding); /* check for malloc failure on critical fields above */ if(!memory_copy->cache_obj.address || !memory_copy->cache_obj.content_type) { net_FreeMemoryCopy(memory_copy); goto malloc_failure; /* skip memory cacheing */ } HG83363 /* build the stream object */ stream = PR_NEW(NET_StreamClass); if(!stream) { net_FreeMemoryCopy(memory_copy); goto malloc_failure; /* skip memory cacheing */ } /* this structure gets passed back into the write, complete * and abort stream functions */ data_object = PR_NEW(CacheDataObject); if (!data_object) { PR_Free(stream); net_FreeMemoryCopy(memory_copy); goto malloc_failure; /* skip memory cacheing */ } /* init the object */ memset(data_object, 0, sizeof(CacheDataObject)); /* assign the cache object to the stream data object */ data_object->memory_copy = memory_copy; if (mem_conv_obj->dont_hold_URL_s == FALSE) data_object->URL_s = URL_s; TRACEMSG(("Returning stream from NET_CacheConverter\n")); stream->name = "Cache stream"; stream->complete = (MKStreamCompleteFunc) net_MemCacheComplete; stream->abort = (MKStreamAbortFunc) net_MemCacheAbort; stream->put_block = (MKStreamWriteFunc) net_MemCacheWrite; stream->is_write_ready = (MKStreamWriteReadyFunc) net_MemCacheWriteReady; stream->data_object = data_object; /* document info object */ stream->window_id = window_id; /* next stream is passed in by the caller but can be null */ data_object->next_stream = mem_conv_obj->next_stream; PR_APPEND_LINK(&data_object->links, &mem_active_cache_data_objects); /* add the cache object to the hash list, but don't * complete it yet */ net_MemCacheAddObjectToCache(data_object); return stream; malloc_failure: /* target of malloc failure */ TRACEMSG(("NOT Caching this URL")); /* bypass the whole cache mechanism */ if(format_out != FO_CACHE_ONLY) { format_out = CLEAR_CACHE_BIT(format_out); return(mem_conv_obj->next_stream); } return(NULL); } PRIVATE net_MemoryCacheObject * net_FindObjectInMemoryCache(URL_Struct *URL_s) { net_MemoryCacheObject tmp_cache_obj, *return_obj; /* fill in the temporary cache object so we can * use it for searching */ memset(&tmp_cache_obj, 0, sizeof(tmp_cache_obj)); tmp_cache_obj.cache_obj.method = URL_s->method; tmp_cache_obj.cache_obj.address = URL_s->address; tmp_cache_obj.cache_obj.post_data = URL_s->post_data; tmp_cache_obj.cache_obj.post_data_size = URL_s->post_data_size; return_obj = (net_MemoryCacheObject *) XP_HashListFindObject(net_MemoryCacheHashList, &tmp_cache_obj); if (return_obj) return (return_obj); else { /* try unescaping the URL address - MHTML parts are escaped, and weren't getting picked up in the cache */ tmp_cache_obj.cache_obj.address = PL_strdup(URL_s->address); if (tmp_cache_obj.cache_obj.address) { /* unescape it */ NET_UnEscape(tmp_cache_obj.cache_obj.address); if (tmp_cache_obj.cache_obj.address) { return_obj = (net_MemoryCacheObject *) XP_HashListFindObject(net_MemoryCacheHashList, &tmp_cache_obj); PR_Free(tmp_cache_obj.cache_obj.address); } } return (return_obj); } } /* set or unset a lock on a memory cache object */ MODULE_PRIVATE void NET_ChangeMemCacheLock(URL_Struct *URL_s, PRBool set) { net_MemoryCacheObject * found_cache_obj; /* look up cache struct */ found_cache_obj = net_FindObjectInMemoryCache(URL_s); if(found_cache_obj && found_cache_obj->completed) { PR_ASSERT(found_cache_obj->external_locks >= 0); if(set) { /* increment lock counter */ found_cache_obj->external_locks++; } else { /* decrement lock counter */ found_cache_obj->external_locks--; /* PR_ASSERT(found_cache_obj->external_locks >= 0); */ if(found_cache_obj->external_locks < 0) found_cache_obj->external_locks = 0; } } } /* remove a URL from the memory cache */ MODULE_PRIVATE void NET_RemoveURLFromMemCache(URL_Struct *URL_s) { net_MemoryCacheObject * found_cache_obj; found_cache_obj = net_FindObjectInMemoryCache(URL_s); if(found_cache_obj && (found_cache_obj->mem_read_lock == 0) && found_cache_obj->completed) net_FreeMemoryCopy(found_cache_obj); } /* Returns TRUE if the URL is currently in the * memory cache and false otherwise. */ PUBLIC XP_Bool NET_IsURLInMemCache(URL_Struct *URL_s) { if(net_FindObjectInMemoryCache(URL_s)) return(TRUE); else return(FALSE); } /* this function looks up a URL in the hash table and * returns MEMORY_CACHE_TYPE_URL if it's found and * should be loaded via the memory cache. * * It also sets several entries in the passed in URL * struct including "memory_copy" which is a pointer * to the found net_MemoryCacheObject struct. */ MODULE_PRIVATE int NET_FindURLInMemCache(URL_Struct * URL_s, MWContext *ctxt) #ifdef NU_CACHE { PR_ASSERT(0); /* Should not be getting called. Also, compiler will warn of missing prototype */ return 0; } #else { net_MemoryCacheObject *found_cache_obj; TRACEMSG(("Checking for URL in cache")); if(!net_MemoryCacheHashList) return(0); found_cache_obj = net_FindObjectInMemoryCache(URL_s); if(found_cache_obj) { TRACEMSG(("mkcache: found URL in memory cache!")); if(found_cache_obj->current_page_only) { History_entry * he = SHIST_GetCurrent(&ctxt->hist); int hist_num; /* if the current_page_only flag is set * then the page should only be * served if it's the current document loaded * (i.e. reloads) * * @@@ if !he then let it through, this allows the * doc info window to work */ if(he) { hist_num = SHIST_GetIndex(&ctxt->hist, he); /* we can tell if the document being loaded is the * same as the current document by looking up it's * index in the history. If they don't match * then it isn't the current document */ if(URL_s->history_num != hist_num) return 0; } } /* set a pointer to the structure in the URL struct */ URL_s->memory_copy = found_cache_obj; /* copy the contents of the URL struct so that the content type * and other stuff gets recorded */ StrAllocCopy(URL_s->content_type, found_cache_obj->cache_obj.content_type); StrAllocCopy(URL_s->charset, found_cache_obj->cache_obj.charset); StrAllocCopy(URL_s->content_encoding, found_cache_obj->cache_obj.content_encoding); URL_s->content_length = found_cache_obj->cache_obj.content_length; URL_s->real_content_length = found_cache_obj->cache_obj.content_length; URL_s->expires = found_cache_obj->cache_obj.expires; URL_s->last_modified = found_cache_obj->cache_obj.last_modified; URL_s->is_netsite = found_cache_obj->cache_obj.is_netsite; HG26557 net_cache_adding_object++; /* semaphore */ /* reorder objects so that the list is in last accessed order */ XP_ListRemoveObject(net_MemoryCacheList, found_cache_obj); XP_ListAddObject(net_MemoryCacheList, found_cache_obj); net_cache_adding_object--; /* semaphore */ TIMING_MESSAGE(("cache,%s,in memory", URL_s->address)); TRACEMSG(("Cached copy is valid. returning method")); return(MEMORY_CACHE_TYPE_URL); } TRACEMSG(("URL not found in cache")); return(0); } #endif /***************************************************************** * Memory cache output module routine * * This set of routines pushes the document in memory up a stream * created by NET_StreamBuilder */ /* used to hold data between invokations of ProcessNet */ typedef struct _MemCacheConData { XP_List *cur_list_ptr; uint32 bytes_written_in_segment; NET_StreamClass *stream; } MemCacheConData; #define CD_CUR_LIST_PTR connection_data->cur_list_ptr #define CD_BYTES_WRITTEN_IN_SEGMENT connection_data->bytes_written_in_segment #define CD_STREAM connection_data->stream #define CE_URL_S cur_entry->URL_s #define CE_WINDOW_ID cur_entry->window_id #define CE_FORMAT_OUT cur_entry->format_out #define CE_STATUS cur_entry->status #define CE_BYTES_RECEIVED cur_entry->bytes_received /* begin the load, This is called from NET_GetURL */ #ifdef OLD_MOZ_MAIL_NEWS extern int net_InitializeNewsFeData (ActiveEntry * cur_entry); extern int IMAP_InitializeImapFeData (ActiveEntry * cur_entry); extern void IMAP_URLFinished(URL_Struct *URL_s); #endif /* OLD_MOZ_MAIL_NEWS */ PRIVATE int32 net_MemoryCacheLoad (ActiveEntry * cur_entry) #ifdef NU_CACHE { PR_ASSERT(0); /* Should not be getting called */ return 0; } #else { /* get memory for Connection Data */ MemCacheConData * connection_data = PR_NEW(MemCacheConData); net_MemorySegment * mem_seg; uint32 chunk_size; char *mem_seg_ptr; char *first_buffer; TRACEMSG(("Entering NET_MemoryCacheLoad!\n")); if(!connection_data) { CE_URL_S->error_msg = NET_ExplainErrorDetails(MK_OUT_OF_MEMORY); CE_STATUS = MK_OUT_OF_MEMORY; return (CE_STATUS); } if (!CE_URL_S->memory_copy) { /* the memory_copy has been freed before fully * making it into the cache. In other words, it's * been aborted. Abort this load then, also. * We should probably never hit this case, however. * If we got here, it means we've just found this entry * in the hash table, which means we have not deleted it * and we have not set the delete_me flag. */ PR_ASSERT(FALSE); CE_STATUS = MK_OBJECT_NOT_IN_CACHE; return (CE_STATUS); } cur_entry->protocol = MEMORY_CACHE_TYPE_URL; cur_entry->memory_file = TRUE; /* point to the first list struct that contains data */ CD_CUR_LIST_PTR = CE_URL_S->memory_copy->list->next; CD_BYTES_WRITTEN_IN_SEGMENT = 0; /* put a read lock on the data */ CE_URL_S->memory_copy->mem_read_lock++; cur_entry->con_data = connection_data; cur_entry->local_file = TRUE; cur_entry->socket = NULL; NET_SetCallNetlibAllTheTime(CE_WINDOW_ID, "mkmemcac"); cur_entry->format_out = CLEAR_CACHE_BIT(cur_entry->format_out); FE_EnableClicking(CE_WINDOW_ID); #ifdef OLD_MOZ_MAIL_NEWS if (cur_entry->format_out == FO_PRESENT) { if (NET_URL_Type(cur_entry->URL_s->address) == NEWS_TYPE_URL) { /* #### DISGUSTING KLUDGE to make cacheing work for news articles. */ cur_entry->status = net_InitializeNewsFeData (cur_entry); if (cur_entry->status < 0) { /* #### what error message? */ return cur_entry->status; } } else if (!PL_strncmp(CE_URL_S->address, "Mailbox://", 10)) { /* #### DISGUSTING KLUDGE to make cacheing work for imap articles. */ cur_entry->status = IMAP_InitializeImapFeData (cur_entry); if (cur_entry->status < 0) { /* #### what error message? */ return cur_entry->status; } } } #endif /* OLD_MOZ_MAIL_NEWS */ /* open the outgoing stream */ CD_STREAM = NET_StreamBuilder(CE_FORMAT_OUT, CE_URL_S, CE_WINDOW_ID); if(!CD_STREAM) { NET_ClearCallNetlibAllTheTime(CE_WINDOW_ID, "mkmemcac"); PR_Free(connection_data); CE_URL_S->error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_CONVERT); CE_STATUS = MK_UNABLE_TO_CONVERT; return (CE_STATUS); } if (!CE_URL_S->load_background) FE_GraphProgressInit(CE_WINDOW_ID, CE_URL_S, CE_URL_S->content_length); /* process one chunk of the * cache file so that * layout can continue * when images are in the cache */ #define FIRST_BUFF_SIZE 1024 if (CE_URL_S->memory_copy->completed) { mem_seg = (net_MemorySegment *) CD_CUR_LIST_PTR->object; mem_seg_ptr = mem_seg->segment; chunk_size = MIN(FIRST_BUFF_SIZE, mem_seg->in_use-CD_BYTES_WRITTEN_IN_SEGMENT); /* malloc this first buffer because we can't use * the NET_SocketBuffer in calls from NET_GetURL * because of reentrancy */ first_buffer = (char *) PR_Malloc(chunk_size); if(!first_buffer) { PR_Free(connection_data); CE_URL_S->error_msg = NET_ExplainErrorDetails(MK_OUT_OF_MEMORY); return(MK_OUT_OF_MEMORY); } /* copy the segment because the parser will muck with it */ memcpy(first_buffer, mem_seg_ptr+CD_BYTES_WRITTEN_IN_SEGMENT, (size_t) chunk_size); CD_BYTES_WRITTEN_IN_SEGMENT += chunk_size; CE_STATUS = (*CD_STREAM->put_block)(CD_STREAM, first_buffer, chunk_size); if(CE_STATUS < 0) { NET_ClearCallNetlibAllTheTime(CE_WINDOW_ID, "mkmemcac"); if (!CE_URL_S->load_background) FE_GraphProgressDestroy(CE_WINDOW_ID, CE_URL_S, CE_URL_S->content_length, CE_BYTES_RECEIVED); PR_Free(connection_data); return (CE_STATUS); } CE_BYTES_RECEIVED += chunk_size; /* check to see if we need to advance the pointer yet. * should hardly ever happen here since the first buffer * is so small */ if(CD_BYTES_WRITTEN_IN_SEGMENT >= mem_seg->in_use) { CD_CUR_LIST_PTR = CD_CUR_LIST_PTR->next; CD_BYTES_WRITTEN_IN_SEGMENT = 0; } PR_Free(first_buffer); } else { CE_STATUS = 0; } return(CE_STATUS); } #endif /* NU_CACHE */ /* called repeatedly from NET_ProcessNet to push all the * data up the stream */ PRIVATE int32 net_ProcessMemoryCache (ActiveEntry * cur_entry) #ifdef NU_CACHE { PR_ASSERT(0); /* Should not be getting called */ return 0; } #else { MemCacheConData * connection_data = (MemCacheConData *)cur_entry->con_data; net_MemorySegment * mem_seg; uint32 chunk_size; uint32 buffer_size; char *mem_seg_ptr; if (!CE_URL_S->memory_copy) { /* the memory_copy has been freed before fully * making it into the cache. In other words, it's * been aborted. Abort this load then, also, * since it's a concurrent load. * We know that CE_URL_S->memory_copy will be NULL * if it's been removed, because we have a read lock * on the entry, and that will cause the delete_me * flag to be set, rather than just deleting the * object initially. We catch the delete_me flag * here, and set CE_URL_S->memory_copy to NULL. */ CE_STATUS = MK_OBJECT_NOT_IN_CACHE; return (CE_STATUS); } /* wait until the object has been fully inserted into * the cache. */ if (!CE_URL_S->memory_copy->completed && !(CE_URL_S->memory_copy->delete_me && CE_URL_S->memory_copy->aborted)) { /* normal case - we are still waiting for it to complete */ return 0; } if(!CD_CUR_LIST_PTR || (CE_URL_S->memory_copy->aborted && CE_URL_S->memory_copy->delete_me)) { /* when CD_CUR_LIST_PTR turns NULL we are at the end * of the document. Finish up the stream and exit. * * If the entry is aborted and the delete_me flag is set, * the stream was aborted in the middle of being written. * If we are here, then it's simultaneously being read also. * So, finish up. */ /* complete the stream */ (*CD_STREAM->complete)(CD_STREAM); /* free the stream */ PR_Free(CD_STREAM); /* remove the read lock */ CE_URL_S->memory_copy->mem_read_lock--; /* check to see if we should delete this memory cached object * * delete_me is set by FreeMemoryCacheObject when it tried * to free it but couldn't because of read locks on the * object */ if(CE_URL_S->memory_copy->delete_me && CE_URL_S->memory_copy->mem_read_lock == 0) { net_FreeMemoryCopy(CE_URL_S->memory_copy); CE_URL_S->memory_copy = 0; } /* PR_Free the structs used by this protocol module */ PR_Free(connection_data); /* set the status to success */ if (CE_URL_S->memory_copy && CE_URL_S->memory_copy->completed) CE_STATUS = MK_DATA_LOADED; else CE_STATUS = MK_OBJECT_NOT_IN_CACHE; /* clear the CallNetlibAllTheTime if there are no * other readers */ NET_ClearCallNetlibAllTheTime(CE_WINDOW_ID, "mkmemcac"); if (!CE_URL_S->load_background) FE_GraphProgressDestroy(CE_WINDOW_ID, CE_URL_S, CE_URL_S->content_length, CE_BYTES_RECEIVED); #ifdef OLD_MOZ_MAIL_NEWS if (!PL_strncmp(CE_URL_S->address, "Mailbox://", 10)) /* #### DISGUSTING KLUDGE to make cacheing work for imap articles. */ IMAP_URLFinished(CE_URL_S); #endif /* Tell ProcessNet that we are all done */ return(-1); } /* CD_CUR_LIST_PTR is pointing to the most current * memory segment list object */ mem_seg = (net_MemorySegment *) CD_CUR_LIST_PTR->object; TRACEMSG(("ProcessMemoryCache: printing segment %p",mem_seg)); mem_seg_ptr = mem_seg->segment; /* write out at least part of the buffer */ buffer_size = (*CD_STREAM->is_write_ready)(CD_STREAM); buffer_size = MIN(buffer_size, (unsigned int) NET_Socket_Buffer_Size); /* make it ??? at the most * when coming out of the cache */ buffer_size = MIN(buffer_size, NET_MEM_CACHE_OUTPUT_SIZE); chunk_size = MIN(buffer_size, mem_seg->in_use-CD_BYTES_WRITTEN_IN_SEGMENT); /* copy the segment because the parser will muck with it */ memcpy(NET_Socket_Buffer, mem_seg_ptr+CD_BYTES_WRITTEN_IN_SEGMENT, (size_t) chunk_size); /* remember how much of this segment we have written */ CD_BYTES_WRITTEN_IN_SEGMENT += chunk_size; CE_STATUS = (*CD_STREAM->put_block)(CD_STREAM, NET_Socket_Buffer, chunk_size); CE_BYTES_RECEIVED += chunk_size; /* check to see if we need to advance the pointer yet */ if(CD_BYTES_WRITTEN_IN_SEGMENT >= mem_seg->in_use) { CD_CUR_LIST_PTR = CD_CUR_LIST_PTR->next; CD_BYTES_WRITTEN_IN_SEGMENT = 0; } if (!CE_URL_S->load_background) FE_GraphProgress(CE_WINDOW_ID, CE_URL_S, CE_BYTES_RECEIVED, chunk_size, CE_URL_S->content_length); if(CE_STATUS < 0) { NET_ClearCallNetlibAllTheTime(CE_WINDOW_ID, "mkmemcac"); (*CD_STREAM->abort)(CD_STREAM, CE_STATUS); } return(CE_STATUS); } #endif /* NU_CACHE */ /* called by functions in mkgeturl to interrupt the loading of * an object. (Usually a user interrupt) */ PRIVATE int32 net_InterruptMemoryCache (ActiveEntry * cur_entry) #ifdef NU_CACHE { PR_ASSERT(0); /* Should not be getting called */ return 0; } #else { MemCacheConData * connection_data = (MemCacheConData *)cur_entry->con_data; /* abort and free the outgoing stream */ (*CD_STREAM->abort)(CD_STREAM, MK_INTERRUPTED); PR_Free(CD_STREAM); if (!CE_URL_S->memory_copy) { /* the memory_copy has been freed before fully * making it into the cache. In other words, it's * been aborted. Abort this load then, also, * since it's a concurrent load. */ CE_STATUS = MK_OBJECT_NOT_IN_CACHE; return (CE_STATUS); } /* remove the read lock */ CE_URL_S->memory_copy->mem_read_lock--; /* check to see if we should delete this memory cached object */ if(CE_URL_S->memory_copy->delete_me && CE_URL_S->memory_copy->mem_read_lock == 0) { net_FreeMemoryCopy(CE_URL_S->memory_copy); CE_URL_S->memory_copy = 0; } /* PR_Free the structs */ PR_Free(connection_data); CE_STATUS = MK_INTERRUPTED; NET_ClearCallNetlibAllTheTime(CE_WINDOW_ID, "mkmemcac"); return(CE_STATUS); } #endif /* create an HTML stream and push a bunch of HTML about * the memory cache */ MODULE_PRIVATE void NET_DisplayMemCacheInfoAsHTML(ActiveEntry * cur_entry) { char *buffer = (char*)PR_Malloc(2048); char *address; char *escaped; NET_StreamClass * stream; net_CacheObject * cache_obj; net_MemoryCacheObject * mem_cache_obj; XP_Bool long_form = FALSE; int32 number_in_memory_cache; XP_List *list_ptr; int i; if(!buffer) { cur_entry->status = MK_UNABLE_TO_CONVERT; return; } if(PL_strcasestr(cur_entry->URL_s->address, "?long")) long_form = TRUE; else if(PL_strcasestr(cur_entry->URL_s->address, "?traceon")) #ifdef NU_CACHE CacheTrace_Enable(TRUE); #else NET_CacheTraceOn = TRUE; #endif else if(PL_strcasestr(cur_entry->URL_s->address, "?traceoff")) #ifdef NU_CACHE CacheTrace_Enable(FALSE); #else NET_CacheTraceOn = FALSE; #endif StrAllocCopy(cur_entry->URL_s->content_type, TEXT_HTML); cur_entry->format_out = CLEAR_CACHE_BIT(cur_entry->format_out); stream = NET_StreamBuilder(cur_entry->format_out, cur_entry->URL_s, cur_entry->window_id); if(!stream) { cur_entry->status = MK_UNABLE_TO_CONVERT; PR_Free(buffer); return; } /* define a macro to push a string up the stream * and handle errors */ #define PUT_PART(part) \ cur_entry->status = (*stream->put_block)(stream, \ part ? part : "Unknown", \ part ? PL_strlen(part) : 7); \ if(cur_entry->status < 0) \ goto END; if(!net_MemoryCacheList) { PL_strcpy(buffer, "There are no objects in the memory cache"); PUT_PART(buffer); goto END; } number_in_memory_cache = XP_ListCount(net_MemoryCacheList); /* add the header info */ sprintf(buffer, "Information about the Netscape memory cache\n" "

Memory Cache statistics

\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "\n" "
Maximum size:%ld
Current size:%ld
Number of files in cache:%ld
Average cache file size:%ld
\n" "
", net_MaxMemoryCacheSize, net_MemoryCacheSize, number_in_memory_cache, number_in_memory_cache ? net_MemoryCacheSize/number_in_memory_cache : 0); PUT_PART(buffer); /* define some macros to help us output HTML tables */ #if 0 #define TABLE_TOP(arg1) \ sprintf(buffer, \ "%s\n" \ "", arg1); \ PUT_PART(buffer); #define TABLE_BOTTOM \ sprintf(buffer, \ ""); \ PUT_PART(buffer); #else #define TABLE_TOP(arg1) \ PL_strcpy(buffer, ""); \ for(i=PL_strlen(arg1); i < 16; i++) \ PL_strcat(buffer, " "); \ PL_strcat(buffer, arg1); \ PL_strcat(buffer, " "); \ PUT_PART(buffer); #define TABLE_BOTTOM \ PL_strcpy(buffer, "
\n"); \ PUT_PART(buffer); #endif list_ptr = net_MemoryCacheList; while((mem_cache_obj = (net_MemoryCacheObject *) XP_ListNextObject(list_ptr)) != NULL) { cache_obj = &mem_cache_obj->cache_obj; address = PL_strdup(mem_cache_obj->cache_obj.address); /* put the URL out there */ TABLE_TOP("URL:"); PL_strcpy(buffer, ""); PUT_PART(buffer); escaped = NET_EscapeHTML(address); PUT_PART(escaped); PR_Free(address); PR_Free(escaped); PL_strcpy(buffer, ""); PUT_PART(buffer); TABLE_BOTTOM; TABLE_TOP("Content Length:"); sprintf(buffer, "%lu", cache_obj->content_length); PUT_PART(buffer); TABLE_BOTTOM; TABLE_TOP("Content type:"); PUT_PART(cache_obj->content_type); TABLE_BOTTOM; TABLE_TOP("Last Modified:"); if(cache_obj->last_modified) { PUT_PART(ctime(&cache_obj->last_modified)); } else { PL_strcpy(buffer, "No date sent"); PUT_PART(buffer); } TABLE_BOTTOM; TABLE_TOP("Expires:"); if(cache_obj->expires) { PUT_PART(ctime(&cache_obj->expires)); } else { PL_strcpy(buffer, "No expiration date sent"); PUT_PART(buffer); } TABLE_BOTTOM; TABLE_TOP("Last accessed:"); PUT_PART(ctime(&cache_obj->last_accessed)); TABLE_BOTTOM; TABLE_TOP("Character set:"); if(cache_obj->charset) { PUT_PART(cache_obj->charset); } else { PL_strcpy(buffer, "iso-8859-1 (default)"); PUT_PART(buffer); } TABLE_BOTTOM; HG27328 PL_strcpy(buffer, "\n

\n"); PUT_PART(buffer); } END: PR_Free(buffer); if(cur_entry->status < 0) (*stream->abort)(stream, cur_entry->status); else (*stream->complete)(stream); return; } /*Accessor for use by Cache Browser */ PUBLIC net_CacheObject* NET_FirstMemCacheObject(XP_List* list_ptr) { if (net_MemoryCacheList) { list_ptr = net_MemoryCacheList; return NET_NextMemCacheObject(list_ptr); } else return 0; } /*Accessor for use by Cache Browser */ PUBLIC net_CacheObject* NET_NextMemCacheObject(XP_List* list_ptr) { if (list_ptr) { net_MemoryCacheObject * tmp = (net_MemoryCacheObject *) XP_ListNextObject(list_ptr); if (tmp) { return &tmp->cache_obj; } } return 0; } #include "libmocha.h" NET_StreamClass * net_CloneWysiwygMemCacheEntry(MWContext *window_id, URL_Struct *URL_s, uint32 nbytes, const char * wysiwyg_url, const char * base_href) #ifdef NU_CACHE { PR_ASSERT(0); return NULL; } #else { net_MemoryCacheObject *memory_copy; PRCList *link; CacheDataObject *data_object; NET_StreamClass *stream; XP_List *list; net_MemorySegment *seg; uint32 len; if (!(memory_copy = URL_s->memory_copy)) { /* not hitting the cache -- check whether we're filling it */ for (link = mem_active_cache_data_objects.next; link != &mem_active_cache_data_objects; link = link->next) { data_object = (CacheDataObject *)link; if (data_object->URL_s == URL_s && (memory_copy = data_object->memory_copy) != NULL) { goto found; } } return NULL; } found: stream = LM_WysiwygCacheConverter(window_id, URL_s, wysiwyg_url, base_href); if (!stream) return 0; list = memory_copy->list; while (nbytes != 0 && (seg = (net_MemorySegment *) XP_ListNextObject(list)) != NULL) { len = seg->seg_size; if (len > nbytes) len = nbytes; if (stream->put_block(stream, seg->segment, (int32)len) < 0) break; nbytes -= len; } if (nbytes != 0) { /* NB: Our caller must clear top_state->mocha_write_stream. */ stream->abort(stream, MK_UNABLE_TO_CONVERT); PR_Free(stream); return 0; } return stream; } #endif PRIVATE void net_CleanupMemoryCacheProtocol(void) { } void NET_InitMemCacProtocol(void) /* no prototype when NU_CACHE */ { static NET_ProtoImpl mem_cac_proto_impl; #ifdef NU_CACHE PR_ASSERT(0); return; #endif mem_cac_proto_impl.init = net_MemoryCacheLoad; mem_cac_proto_impl.process = net_ProcessMemoryCache; mem_cac_proto_impl.interrupt = net_InterruptMemoryCache; mem_cac_proto_impl.cleanup = net_CleanupMemoryCacheProtocol; NET_RegisterProtocolImplementation(&mem_cac_proto_impl, MEMORY_CACHE_TYPE_URL); } #ifdef NU_CACHE typedef struct _NuCacheConData { void* cache_object; NET_StreamClass *stream; } NuCacheConData; #define FIRST_BUFF_SIZE 1024 PRIVATE int32 net_NuCacheLoad (ActiveEntry * cur_entry) { if (cur_entry && cur_entry->URL_s) { NuCacheConData* con_data = PR_NEW(NuCacheConData); void* pObject = cur_entry->URL_s->cache_object; if (!con_data || !pObject) { cur_entry->URL_s->error_msg = NET_ExplainErrorDetails(MK_OUT_OF_MEMORY); cur_entry->status = MK_OUT_OF_MEMORY; return cur_entry->status; } cur_entry->protocol = NU_CACHE_TYPE_URL; cur_entry->memory_file = (CacheObject_GetModule(pObject) == 0); /* TODO replace 0 with the enum */ /* CacheObject->SetReadLock(pObject); */ cur_entry->local_file = TRUE; /* Check about this one- TODO */ cur_entry->con_data = con_data; cur_entry->socket = NULL; NET_SetCallNetlibAllTheTime(cur_entry->window_id, "nucache"); cur_entry->format_out = CLEAR_CACHE_BIT(cur_entry->format_out); FE_EnableClicking(cur_entry->window_id); if (0==cur_entry->format_out) { /* This means that this is a CACHE_ONLY request and shouldn't * be getting read from memory anyway. So mark it as not present in memory * and return as such. */ cur_entry->status = MK_OBJECT_NOT_IN_CACHE; return cur_entry->status; } /* Build the stream to read data from */ con_data->stream = NET_StreamBuilder(cur_entry->format_out, cur_entry->URL_s, cur_entry->window_id); if(!con_data->stream) { NET_ClearCallNetlibAllTheTime(cur_entry->window_id, "nucache"); PR_DELETE(con_data); cur_entry->URL_s->error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_CONVERT); cur_entry->status = MK_UNABLE_TO_CONVERT; return cur_entry->status; } if (!cur_entry->URL_s->load_background) FE_GraphProgressInit(cur_entry->window_id, cur_entry->URL_s, cur_entry->URL_s->content_length); /* Process the first chunk so that images can start loading */ if (!CacheObject_IsPartial(pObject)) /*todo- change this to is Completed */ { char* firstBuffer = (char*) PR_Malloc(FIRST_BUFF_SIZE); PRInt32 amountRead = 0; if (!firstBuffer) { PR_DELETE(con_data); cur_entry->URL_s->error_msg = NET_ExplainErrorDetails(MK_OUT_OF_MEMORY); return(MK_OUT_OF_MEMORY); } amountRead = CacheObject_Read(pObject, firstBuffer, FIRST_BUFF_SIZE); if (amountRead > 0) { cur_entry->status = (*con_data->stream->put_block)(con_data->stream, firstBuffer, amountRead); if(cur_entry->status < 0) { NET_ClearCallNetlibAllTheTime(cur_entry->window_id, "nucache"); if (!cur_entry->URL_s->load_background) { FE_GraphProgressDestroy(cur_entry->window_id, cur_entry->URL_s, cur_entry->URL_s->content_length, cur_entry->bytes_received); } PR_DELETE(con_data); return (cur_entry->status); } cur_entry->bytes_received += amountRead; PR_DELETE(firstBuffer); } } else { cur_entry->status = 0; } } return cur_entry->status; } /* called repeatedly from NET_ProcessNet to push all the * data up the stream */ PRIVATE int32 net_ProcessNuCache (ActiveEntry * cur_entry) { if (cur_entry) { PRUint32 amountRead; PRUint32 buffer_size; NuCacheConData* con_data = (NuCacheConData*) cur_entry->con_data; void* pObject = cur_entry->URL_s->cache_object; NET_SetCallNetlibAllTheTime(cur_entry->window_id, "nucache"); if (!pObject) { cur_entry->status = MK_OBJECT_NOT_IN_CACHE; return cur_entry->status; } /* Wait for the object to complete */ if (!CacheObject_GetIsCompleted(pObject)) return 0; #if 0 /* If the object has been aborted or expired */ if ((CACHEOBJECT_ABORTED == CacheObject_GetState(pObject)) || (CACHEOBJECT_EXPIRED == CacheObject_GetState(pObject))) { (*con_data->stream->complete)(con_data->stream); PR_Free(con_data->stream); /* CacheObject->UnsetReadLock(pObject); */ PR_Free(con_data); cur_entry->status = MK_DATA_LOADED; NET_ClearCallNetlibAllTheTime(cur_entry->window_id, "nucache"); if (!cur_entry->URL_s->load_background) FE_GraphProgressDestroy( cur_entry->window_id, cur_entry->URL_s, cur_entry->URL_s->content_length, cur_entry->bytes_received); return -1; } #endif /* Get the buffer size that the stream is ready to receive */ buffer_size = (*con_data->stream->is_write_ready)(con_data->stream); /* if the stream doesn't want any data, continue */ if (0 == buffer_size) { cur_entry->status = 1; return cur_entry->status; } /* Use the minimum from these factors. * Not sure why we are doing this part. Will look into this later- Gagan */ buffer_size = MIN(buffer_size, (unsigned int) NET_Socket_Buffer_Size); buffer_size = MIN(buffer_size, NET_MEM_CACHE_OUTPUT_SIZE); amountRead = CacheObject_Read(pObject, NET_Socket_Buffer, buffer_size); if (amountRead > 0) { cur_entry->status = (*con_data->stream->put_block)(con_data->stream, NET_Socket_Buffer, amountRead); /* Update the progress control */ if (!cur_entry->URL_s->load_background) FE_GraphProgress( cur_entry->window_id, cur_entry->URL_s, cur_entry->bytes_received, amountRead, cur_entry->URL_s->content_length); if(cur_entry->status < 0) { NET_ClearCallNetlibAllTheTime(cur_entry->window_id, "nucache"); if (!cur_entry->URL_s->load_background) { FE_GraphProgressDestroy(cur_entry->window_id, cur_entry->URL_s, cur_entry->URL_s->content_length, cur_entry->bytes_received); } PR_Free(con_data); return (cur_entry->status); } cur_entry->bytes_received += amountRead; } else /* we didn't read anything, must be the end. */ { (*con_data->stream->complete)(con_data->stream); PR_Free(con_data->stream); /* Reset read locks, reset streams, etc. */ CacheObject_Reset(pObject); PR_Free(con_data); cur_entry->status = MK_DATA_LOADED; NET_ClearCallNetlibAllTheTime(cur_entry->window_id, "nucache"); if (!cur_entry->URL_s->load_background) FE_GraphProgressDestroy( cur_entry->window_id, cur_entry->URL_s, cur_entry->URL_s->content_length, cur_entry->bytes_received); return -1; } return cur_entry->status; } return -1; } /* called by functions in mkgeturl to interrupt the loading of * an object. (Usually a user interrupt) */ PRIVATE int32 net_InterruptNuCache (ActiveEntry * cur_entry) { if (cur_entry) { NuCacheConData* con_data = (NuCacheConData*) cur_entry->con_data; void* pObject = cur_entry->URL_s->cache_object; (*con_data->stream->abort)(con_data->stream, MK_INTERRUPTED); PR_Free(con_data->stream); /* Reset read locks, reset streams, etc. */ CacheObject_Reset(pObject); PR_Free(con_data); NET_ClearCallNetlibAllTheTime(cur_entry->window_id, "nucache"); cur_entry->status = MK_INTERRUPTED; return cur_entry->status; } return -1; } PRIVATE void net_CleanupNuCacheProtocol(void) { } void NET_InitNuCacheProtocol(void) { static NET_ProtoImpl nu_cache_proto_impl; nu_cache_proto_impl.init = net_NuCacheLoad; nu_cache_proto_impl.process = net_ProcessNuCache; nu_cache_proto_impl.interrupt = net_InterruptNuCache; nu_cache_proto_impl.cleanup = net_CleanupNuCacheProtocol; NET_RegisterProtocolImplementation(&nu_cache_proto_impl, NU_CACHE_TYPE_URL); } #endif /* NU_CACHE */ #endif /* MOZILLA_CLIENT */