gecko/netwerk/protocol/http/nsHttp.h

193 lines
6.8 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 sts=4 et cin: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsHttp_h__
#define nsHttp_h__
#include "plstr.h"
#include "prtime.h"
#include "nsISupportsUtils.h"
#include "nsPromiseFlatString.h"
#include "nsURLHelper.h"
#include "netCore.h"
#include "mozilla/Mutex.h"
// http version codes
#define NS_HTTP_VERSION_UNKNOWN 0
#define NS_HTTP_VERSION_0_9 9
#define NS_HTTP_VERSION_1_0 10
#define NS_HTTP_VERSION_1_1 11
namespace mozilla {
namespace net {
enum {
SPDY_VERSION_2 = 2,
SPDY_VERSION_3 = 3
};
} // namespace mozilla::net
} // namespace mozilla
typedef uint8_t nsHttpVersion;
//-----------------------------------------------------------------------------
// http connection capabilities
//-----------------------------------------------------------------------------
#define NS_HTTP_ALLOW_KEEPALIVE (1<<0)
#define NS_HTTP_ALLOW_PIPELINING (1<<1)
// a transaction with this caps flag will continue to own the connection,
// preventing it from being reclaimed, even after the transaction completes.
#define NS_HTTP_STICKY_CONNECTION (1<<2)
// a transaction with this caps flag will, upon opening a new connection,
// bypass the local DNS cache
#define NS_HTTP_REFRESH_DNS (1<<3)
// a transaction with this caps flag will not pass SSL client-certificates
// to the server (see bug #466080), but is may also be used for other things
#define NS_HTTP_LOAD_ANONYMOUS (1<<4)
// a transaction with this caps flag keeps timing information
#define NS_HTTP_TIMING_ENABLED (1<<5)
// a transaction with this flag blocks the initiation of other transactons
// in the same load group until it is complete
#define NS_HTTP_LOAD_AS_BLOCKING (1<<6)
// Disallow the use of the SPDY protocol. This is meant for the contexts
// such as HTTP upgrade which are nonsensical for SPDY, it is not the
// SPDY configuration variable.
#define NS_HTTP_DISALLOW_SPDY (1<<7)
// a transaction with this flag loads without respect to whether the load
// group is currently blocking on some resources
#define NS_HTTP_LOAD_UNBLOCKED (1<<8)
// These flags allow a transaction to use TLS false start with
// weaker security profiles based on past history
#define NS_HTTP_ALLOW_RSA_FALSESTART (1<<9)
#define NS_HTTP_ALLOW_RC4_FALSESTART (1<<10)
//-----------------------------------------------------------------------------
// some default values
//-----------------------------------------------------------------------------
#define NS_HTTP_DEFAULT_PORT 80
#define NS_HTTPS_DEFAULT_PORT 443
#define NS_HTTP_HEADER_SEPS ", \t"
//-----------------------------------------------------------------------------
// http atoms...
//-----------------------------------------------------------------------------
struct nsHttpAtom
{
operator const char *() const { return _val; }
const char *get() const { return _val; }
void operator=(const char *v) { _val = v; }
void operator=(const nsHttpAtom &a) { _val = a._val; }
// private
const char *_val;
};
struct nsHttp
{
static nsresult CreateAtomTable();
static void DestroyAtomTable();
// The mutex is valid any time the Atom Table is valid
// This mutex is used in the unusual case that the network thread and
// main thread might access the same data
static mozilla::Mutex *GetLock();
// will dynamically add atoms to the table if they don't already exist
static nsHttpAtom ResolveAtom(const char *);
static nsHttpAtom ResolveAtom(const nsACString &s)
{
return ResolveAtom(PromiseFlatCString(s).get());
}
// returns true if the specified token [start,end) is valid per RFC 2616
// section 2.2
static bool IsValidToken(const char *start, const char *end);
static inline bool IsValidToken(const nsCString &s) {
const char *start = s.get();
return IsValidToken(start, start + s.Length());
}
// find the first instance (case-insensitive comparison) of the given
// |token| in the |input| string. the |token| is bounded by elements of
// |separators| and may appear at the beginning or end of the |input|
// string. null is returned if the |token| is not found. |input| may be
// null, in which case null is returned.
static const char *FindToken(const char *input, const char *token,
const char *separators);
// This function parses a string containing a decimal-valued, non-negative
// 64-bit integer. If the value would exceed INT64_MAX, then false is
// returned. Otherwise, this function returns true and stores the
// parsed value in |result|. The next unparsed character in |input| is
// optionally returned via |next| if |next| is non-null.
//
// TODO(darin): Replace this with something generic.
//
static bool ParseInt64(const char *input, const char **next,
int64_t *result);
// Variant on ParseInt64 that expects the input string to contain nothing
// more than the value being parsed.
static inline bool ParseInt64(const char *input, int64_t *result) {
const char *next;
return ParseInt64(input, &next, result) && *next == '\0';
}
// Return whether the HTTP status code represents a permanent redirect
static bool IsPermanentRedirect(uint32_t httpStatus);
// Return whether upon a redirect code of httpStatus for method, the
// request method should be rewritten to GET.
static bool ShouldRewriteRedirectToGET(uint32_t httpStatus, nsHttpAtom method);
// Return whether the specified method is safe as per RFC 2616,
// Section 9.1.1.
static bool IsSafeMethod(nsHttpAtom method);
// Declare all atoms
//
// The atom names and values are stored in nsHttpAtomList.h and are brought
// to you by the magic of C preprocessing. Add new atoms to nsHttpAtomList
// and all support logic will be auto-generated.
//
#define HTTP_ATOM(_name, _value) static nsHttpAtom _name;
#include "nsHttpAtomList.h"
#undef HTTP_ATOM
};
//-----------------------------------------------------------------------------
// utilities...
//-----------------------------------------------------------------------------
static inline uint32_t
PRTimeToSeconds(PRTime t_usec)
{
return uint32_t( t_usec / PR_USEC_PER_SEC );
}
#define NowInSeconds() PRTimeToSeconds(PR_Now())
// Round q-value to 2 decimal places; return 2 most significant digits as uint.
#define QVAL_TO_UINT(q) ((unsigned int) ((q + 0.005) * 100.0))
#define HTTP_LWS " \t"
#define HTTP_HEADER_VALUE_SEPS HTTP_LWS ","
#endif // nsHttp_h__