зеркало из https://github.com/mozilla/gecko-dev.git
227 строки
8.0 KiB
C
227 строки
8.0 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim:set ts=4 sw=4 sts=4 et cin: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsHttp_h__
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#define nsHttp_h__
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#if defined(MOZ_LOGGING)
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#define FORCE_PR_LOG
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#endif
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// e10s mess: IPDL-generatd headers include chromium which both #includes
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// prlog.h, and #defines LOG in conflict with this file.
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// Solution: (as described in bug 545995)
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// 1) ensure that this file is #included before any IPDL-generated files and
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// anything else that #includes prlog.h, so that we can make sure prlog.h
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// sees FORCE_PR_LOG if needed.
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// 2) #include IPDL boilerplate, and then undef LOG so our LOG wins.
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// 3) nsNetModule.cpp does its own crazy stuff with #including prlog.h
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// multiple times; allow it to define ALLOW_LATE_NSHTTP_H_INCLUDE to bypass
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// check.
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#if defined(PR_LOG) && !defined(ALLOW_LATE_NSHTTP_H_INCLUDE)
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#error "If nsHttp.h #included it must come before any IPDL-generated files or other files that #include prlog.h"
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#endif
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#include "mozilla/net/NeckoChild.h"
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#undef LOG
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#include "plstr.h"
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#include "prlog.h"
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#include "prtime.h"
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#include "nsISupportsUtils.h"
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#include "nsPromiseFlatString.h"
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#include "nsURLHelper.h"
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#include "netCore.h"
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#if defined(PR_LOGGING)
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//
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// Log module for HTTP Protocol logging...
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//
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// To enable logging (see prlog.h for full details):
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//
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// set NSPR_LOG_MODULES=nsHttp:5
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// set NSPR_LOG_FILE=http.log
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//
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// this enables PR_LOG_ALWAYS level information and places all output in
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// the file http.log
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//
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extern PRLogModuleInfo *gHttpLog;
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#endif
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// http logging
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#define LOG1(args) PR_LOG(gHttpLog, 1, args)
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#define LOG2(args) PR_LOG(gHttpLog, 2, args)
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#define LOG3(args) PR_LOG(gHttpLog, 3, args)
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#define LOG4(args) PR_LOG(gHttpLog, 4, args)
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#define LOG(args) LOG4(args)
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#define LOG1_ENABLED() PR_LOG_TEST(gHttpLog, 1)
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#define LOG2_ENABLED() PR_LOG_TEST(gHttpLog, 2)
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#define LOG3_ENABLED() PR_LOG_TEST(gHttpLog, 3)
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#define LOG4_ENABLED() PR_LOG_TEST(gHttpLog, 4)
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#define LOG_ENABLED() LOG4_ENABLED()
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// http version codes
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#define NS_HTTP_VERSION_UNKNOWN 0
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#define NS_HTTP_VERSION_0_9 9
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#define NS_HTTP_VERSION_1_0 10
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#define NS_HTTP_VERSION_1_1 11
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typedef uint8_t nsHttpVersion;
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//-----------------------------------------------------------------------------
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// http connection capabilities
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//-----------------------------------------------------------------------------
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#define NS_HTTP_ALLOW_KEEPALIVE (1<<0)
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#define NS_HTTP_ALLOW_PIPELINING (1<<1)
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// a transaction with this caps flag will continue to own the connection,
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// preventing it from being reclaimed, even after the transaction completes.
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#define NS_HTTP_STICKY_CONNECTION (1<<2)
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// a transaction with this caps flag will, upon opening a new connection,
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// bypass the local DNS cache
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#define NS_HTTP_REFRESH_DNS (1<<3)
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// a transaction with this caps flag will not pass SSL client-certificates
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// to the server (see bug #466080), but is may also be used for other things
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#define NS_HTTP_LOAD_ANONYMOUS (1<<4)
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// a transaction with this caps flag keeps timing information
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#define NS_HTTP_TIMING_ENABLED (1<<5)
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// a transaction with this flag blocks the initiation of other transactons
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// in the same load group until it is complete
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#define NS_HTTP_LOAD_AS_BLOCKING (1<<6)
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// Disallow the use of the SPDY protocol. This is meant for the contexts
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// such as HTTP upgrade which are nonsensical for SPDY, it is not the
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// SPDY configuration variable.
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#define NS_HTTP_DISALLOW_SPDY (1<<7)
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// a transaction with this flag loads without respect to whether the load
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// group is currently blocking on some resources
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#define NS_HTTP_LOAD_UNBLOCKED (1<<8)
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//-----------------------------------------------------------------------------
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// some default values
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//-----------------------------------------------------------------------------
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#define NS_HTTP_DEFAULT_PORT 80
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#define NS_HTTPS_DEFAULT_PORT 443
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#define NS_HTTP_HEADER_SEPS ", \t"
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//-----------------------------------------------------------------------------
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// http atoms...
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//-----------------------------------------------------------------------------
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struct nsHttpAtom
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{
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operator const char *() const { return _val; }
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const char *get() const { return _val; }
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void operator=(const char *v) { _val = v; }
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void operator=(const nsHttpAtom &a) { _val = a._val; }
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// private
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const char *_val;
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};
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struct nsHttp
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{
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static nsresult CreateAtomTable();
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static void DestroyAtomTable();
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// The mutex is valid any time the Atom Table is valid
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// This mutex is used in the unusual case that the network thread and
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// main thread might access the same data
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static mozilla::Mutex *GetLock();
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// will dynamically add atoms to the table if they don't already exist
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static nsHttpAtom ResolveAtom(const char *);
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static nsHttpAtom ResolveAtom(const nsACString &s)
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{
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return ResolveAtom(PromiseFlatCString(s).get());
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}
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// returns true if the specified token [start,end) is valid per RFC 2616
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// section 2.2
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static bool IsValidToken(const char *start, const char *end);
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static inline bool IsValidToken(const nsCString &s) {
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const char *start = s.get();
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return IsValidToken(start, start + s.Length());
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}
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// find the first instance (case-insensitive comparison) of the given
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// |token| in the |input| string. the |token| is bounded by elements of
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// |separators| and may appear at the beginning or end of the |input|
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// string. null is returned if the |token| is not found. |input| may be
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// null, in which case null is returned.
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static const char *FindToken(const char *input, const char *token,
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const char *separators);
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// This function parses a string containing a decimal-valued, non-negative
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// 64-bit integer. If the value would exceed INT64_MAX, then false is
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// returned. Otherwise, this function returns true and stores the
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// parsed value in |result|. The next unparsed character in |input| is
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// optionally returned via |next| if |next| is non-null.
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//
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// TODO(darin): Replace this with something generic.
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//
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static bool ParseInt64(const char *input, const char **next,
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int64_t *result);
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// Variant on ParseInt64 that expects the input string to contain nothing
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// more than the value being parsed.
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static inline bool ParseInt64(const char *input, int64_t *result) {
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const char *next;
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return ParseInt64(input, &next, result) && *next == '\0';
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}
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// Return whether the HTTP status code represents a permanent redirect
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static bool IsPermanentRedirect(uint32_t httpStatus);
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// Return whether upon a redirect code of httpStatus for method, the
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// request method should be rewritten to GET.
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static bool ShouldRewriteRedirectToGET(uint32_t httpStatus, nsHttpAtom method);
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// Return whether the specified method is safe as per RFC 2616,
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// Section 9.1.1.
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static bool IsSafeMethod(nsHttpAtom method);
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// Declare all atoms
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//
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// The atom names and values are stored in nsHttpAtomList.h and are brought
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// to you by the magic of C preprocessing. Add new atoms to nsHttpAtomList
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// and all support logic will be auto-generated.
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//
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#define HTTP_ATOM(_name, _value) static nsHttpAtom _name;
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#include "nsHttpAtomList.h"
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#undef HTTP_ATOM
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};
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//-----------------------------------------------------------------------------
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// utilities...
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//-----------------------------------------------------------------------------
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static inline uint32_t
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PRTimeToSeconds(PRTime t_usec)
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{
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return uint32_t( t_usec / PR_USEC_PER_SEC );
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}
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#define NowInSeconds() PRTimeToSeconds(PR_Now())
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// Round q-value to 2 decimal places; return 2 most significant digits as uint.
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#define QVAL_TO_UINT(q) ((unsigned int) ((q + 0.005) * 100.0))
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#define HTTP_LWS " \t"
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#define HTTP_HEADER_VALUE_SEPS HTTP_LWS ","
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#endif // nsHttp_h__
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