examples: new FTP wildcard showcase

docs/examples/Makefile.inc

@@ -1,16 +1,12 @@
 # These are all libcurl example programs to be test compiled
-check_PROGRAMS = 10-at-a-time anyauthput cookie_interface \
-  debug fileupload fopen ftpget ftpgetresp ftpupload \
-  getinfo getinmemory http-post httpput \
-  https multi-app multi-debugcallback multi-double \
-  multi-post multi-single persistant post-callback \
-  postit2 sepheaders simple simplepost simplessl \
-  sendrecv httpcustomheader certinfo chkspeed ftpgetinfo
+check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \
+  fopen ftpget ftpgetresp ftpupload getinfo getinmemory http-post httpput  \
+  https multi-app multi-debugcallback multi-double multi-post multi-single \
+  persistant post-callback postit2 sepheaders simple simplepost simplessl  \
+  sendrecv httpcustomheader certinfo chkspeed ftpgetinfo ftp-wildcard
 
 # These examples require external dependencies that may not be commonly
 # available on POSIX systems, so don't bother attempting to compile them here.
-COMPLICATED_EXAMPLES = \
- curlgtk.c curlx.c htmltitle.cc cacertinmem.c ftpuploadresume.c \
- ghiper.c hiperfifo.c htmltidy.c multithread.c \
- opensslthreadlock.c sampleconv.c synctime.c threaded-ssl.c evhiperfifo.c
-
+COMPLICATED_EXAMPLES = curlgtk.c curlx.c htmltitle.cc cacertinmem.c	   \
+  ftpuploadresume.c ghiper.c hiperfifo.c htmltidy.c multithread.c	   \
+  opensslthreadlock.c sampleconv.c synctime.c threaded-ssl.c evhiperfifo.c

docs/examples/ftp-wildcard.c

@@ -0,0 +1,136 @@
+/*****************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ */
+
+#include <curl/curl.h>
+#include <stdio.h>
+
+struct callback_data {
+  FILE *output;
+};
+
+static long file_is_comming(struct curl_fileinfo *finfo,
+                            struct callback_data *data,
+                            int remains);
+
+static long file_is_downloaded(struct callback_data *data);
+
+static size_t write_it(char *buff, size_t size, size_t nmemb,
+                       struct callback_data *data);
+
+int main(int argc, char **argv)
+{
+  int rc = CURLE_OK;
+
+  /* curl easy handle */
+  CURL *handle;
+
+  /* help data */
+  struct callback_data data = { 0 };
+
+  /* global initialization */
+  rc = curl_global_init(CURL_GLOBAL_ALL);
+  if(rc)
+    return rc;
+
+  /* initialization of easy handle */
+  handle = curl_easy_init();
+  if(!handle) {
+    curl_global_cleanup();
+    return CURLE_OUT_OF_MEMORY;
+  }
+
+  /* turn on wildcard matching */
+  curl_easy_setopt(handle, CURLOPT_WILDCARDMATCH, 1L);
+
+  /* callback is called before download of concrete file started */
+  curl_easy_setopt(handle, CURLOPT_CHUNK_BGN_FUNCTION, file_is_comming);
+
+  /* callback is called after data from the file have been transferred */
+  curl_easy_setopt(handle, CURLOPT_CHUNK_END_FUNCTION, file_is_downloaded);
+
+  /* this callback will write contents into files */
+  curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write_it);
+
+  /* put transfer data into callbacks */
+  curl_easy_setopt(handle, CURLOPT_CHUNK_DATA, &data);
+  curl_easy_setopt(handle, CURLOPT_WRITEDATA, &data);
+
+  /* curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L); */
+
+  /* set an URL containing wildcard pattern (only in the last part) */
+  if(argc == 2)
+    curl_easy_setopt(handle, CURLOPT_URL, argv[1]);
+  else
+    curl_easy_setopt(handle, CURLOPT_URL,
+      "ftp://curltest.howto.cz:123456@curltest.howto.cz/test/*");
+
+  /* and start transfer! */
+  rc = curl_easy_perform(handle);
+
+  curl_easy_cleanup(handle);
+  curl_global_cleanup();
+  return rc;
+}
+
+static long file_is_comming(struct curl_fileinfo *finfo,
+                            struct callback_data *data,
+                            int remains)
+{
+  printf("%3d %40s %10luB ", remains, finfo->filename,
+         (unsigned long)finfo->size);
+
+  switch(finfo->filetype) {
+  case CURLFILETYPE_DIRECTORY:
+    printf(" DIR\n");
+    break;
+  case CURLFILETYPE_FILE:
+    printf("FILE ");
+    break;
+  default:
+    printf("OTHER\n");
+    break;
+  }
+
+  if(finfo->filetype == CURLFILETYPE_FILE) {
+    /* do not transfer files >= 50B */
+    if(finfo->size > 50) {
+      printf("SKIPPED\n");
+      return CURL_CHUNK_BGN_FUNC_SKIP;
+    }
+
+    data->output = fopen(finfo->filename, "w");
+    if(!data->output) {
+      return CURL_CHUNK_BGN_FUNC_FAIL;
+    }
+  }
+
+  return CURL_CHUNK_BGN_FUNC_OK;
+}
+
+static long file_is_downloaded(struct callback_data *data)
+{
+  if(data->output) {
+    printf("DOWNLOADED\n");
+    fclose(data->output);
+    data->output = 0x0;
+  }
+  return CURL_CHUNK_END_FUNC_OK;
+}
+
+static size_t write_it(char *buff, size_t size, size_t nmemb,
+                       struct callback_data *data)
+{
+  size_t written = 0;
+  if(data->output)
+    written = fwrite(buff, size, nmemb, data->output);
+  else
+    /* listing output */
+    written = fwrite(buff, size, nmemb, stdout);
+  return written;
+}