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e368dc9c85
This patch was generated by a script. Here's the source of the script for
future reference:
function convert() {
echo "Converting $1 to $2..."
find . ! -wholename "*nsprpub*" \
! -wholename "*security/nss*" \
! -wholename "*/.hg*" \
! -wholename "obj-ff-dbg*" \
! -name nsXPCOMCID.h \
! -name prtypes.h \
-type f \
\( -iname "*.cpp" \
-o -iname "*.h" \
-o -iname "*.c" \
-o -iname "*.cc" \
-o -iname "*.idl" \
-o -iname "*.ipdl" \
-o -iname "*.ipdlh" \
-o -iname "*.mm" \) | \
xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}
convert PRInt8 int8_t
convert PRUint8 uint8_t
convert PRInt16 int16_t
convert PRUint16 uint16_t
convert PRInt32 int32_t
convert PRUint32 uint32_t
convert PRInt64 int64_t
convert PRUint64 uint64_t
convert PRIntn int
convert PRUintn unsigned
convert PRSize size_t
convert PROffset32 int32_t
convert PROffset64 int64_t
convert PRPtrdiff ptrdiff_t
convert PRFloat64 double
651 lines
19 KiB
C++
651 lines
19 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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#include <stdlib.h>
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#include "nsHttpResponseHead.h"
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#include "nsPrintfCString.h"
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#include "prprf.h"
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#include "prtime.h"
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#include "nsCRT.h"
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//-----------------------------------------------------------------------------
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// nsHttpResponseHead <public>
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//-----------------------------------------------------------------------------
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nsresult
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nsHttpResponseHead::SetHeader(nsHttpAtom hdr,
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const nsACString &val,
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bool merge)
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{
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nsresult rv = mHeaders.SetHeader(hdr, val, merge);
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if (NS_FAILED(rv)) return rv;
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// respond to changes in these headers. we need to reparse the entire
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// header since the change may have merged in additional values.
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if (hdr == nsHttp::Cache_Control)
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ParseCacheControl(mHeaders.PeekHeader(hdr));
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else if (hdr == nsHttp::Pragma)
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ParsePragma(mHeaders.PeekHeader(hdr));
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return NS_OK;
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}
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void
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nsHttpResponseHead::SetContentLength(int64_t len)
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{
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mContentLength = len;
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if (!LL_GE_ZERO(len)) // < 0
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mHeaders.ClearHeader(nsHttp::Content_Length);
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else
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mHeaders.SetHeader(nsHttp::Content_Length, nsPrintfCString("%lld", len));
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}
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void
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nsHttpResponseHead::Flatten(nsACString &buf, bool pruneTransients)
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{
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if (mVersion == NS_HTTP_VERSION_0_9)
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return;
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buf.AppendLiteral("HTTP/");
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if (mVersion == NS_HTTP_VERSION_1_1)
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buf.AppendLiteral("1.1 ");
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else
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buf.AppendLiteral("1.0 ");
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buf.Append(nsPrintfCString("%u", unsigned(mStatus)) +
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NS_LITERAL_CSTRING(" ") +
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mStatusText +
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NS_LITERAL_CSTRING("\r\n"));
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if (!pruneTransients) {
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mHeaders.Flatten(buf, false);
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return;
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}
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// otherwise, we need to iterate over the headers and only flatten
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// those that are appropriate.
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uint32_t i, count = mHeaders.Count();
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for (i=0; i<count; ++i) {
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nsHttpAtom header;
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const char *value = mHeaders.PeekHeaderAt(i, header);
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if (!value || header == nsHttp::Connection
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|| header == nsHttp::Proxy_Connection
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|| header == nsHttp::Keep_Alive
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|| header == nsHttp::WWW_Authenticate
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|| header == nsHttp::Proxy_Authenticate
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|| header == nsHttp::Trailer
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|| header == nsHttp::Transfer_Encoding
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|| header == nsHttp::Upgrade
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// XXX this will cause problems when we start honoring
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// Cache-Control: no-cache="set-cookie", what to do?
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|| header == nsHttp::Set_Cookie)
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continue;
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// otherwise, write out the "header: value\r\n" line
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buf.Append(nsDependentCString(header.get()) +
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NS_LITERAL_CSTRING(": ") +
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nsDependentCString(value) +
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NS_LITERAL_CSTRING("\r\n"));
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}
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}
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nsresult
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nsHttpResponseHead::Parse(char *block)
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{
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LOG(("nsHttpResponseHead::Parse [this=%x]\n", this));
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// this command works on a buffer as prepared by Flatten, as such it is
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// not very forgiving ;-)
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char *p = PL_strstr(block, "\r\n");
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if (!p)
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return NS_ERROR_UNEXPECTED;
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*p = 0;
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ParseStatusLine(block);
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do {
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block = p + 2;
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if (*block == 0)
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break;
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p = PL_strstr(block, "\r\n");
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if (!p)
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return NS_ERROR_UNEXPECTED;
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*p = 0;
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ParseHeaderLine(block);
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} while (1);
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return NS_OK;
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}
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void
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nsHttpResponseHead::ParseStatusLine(const char *line)
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{
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//
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// Parse Status-Line:: HTTP-Version SP Status-Code SP Reason-Phrase CRLF
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//
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// HTTP-Version
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ParseVersion(line);
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if ((mVersion == NS_HTTP_VERSION_0_9) || !(line = PL_strchr(line, ' '))) {
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mStatus = 200;
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mStatusText.AssignLiteral("OK");
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}
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else {
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// Status-Code
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mStatus = (uint16_t) atoi(++line);
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if (mStatus == 0) {
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LOG(("mal-formed response status; assuming status = 200\n"));
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mStatus = 200;
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}
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// Reason-Phrase is whatever is remaining of the line
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if (!(line = PL_strchr(line, ' '))) {
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LOG(("mal-formed response status line; assuming statusText = 'OK'\n"));
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mStatusText.AssignLiteral("OK");
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}
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else
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mStatusText = nsDependentCString(++line);
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}
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LOG(("Have status line [version=%u status=%u statusText=%s]\n",
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unsigned(mVersion), unsigned(mStatus), mStatusText.get()));
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}
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nsresult
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nsHttpResponseHead::ParseHeaderLine(const char *line)
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{
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nsHttpAtom hdr = {0};
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char *val;
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nsresult rv;
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rv = mHeaders.ParseHeaderLine(line, &hdr, &val);
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if (NS_FAILED(rv))
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return rv;
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// leading and trailing LWS has been removed from |val|
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// handle some special case headers...
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if (hdr == nsHttp::Content_Length) {
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int64_t len;
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const char *ignored;
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// permit only a single value here.
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if (nsHttp::ParseInt64(val, &ignored, &len)) {
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mContentLength = len;
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}
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else {
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// If this is a negative content length then just ignore it
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LOG(("invalid content-length! %s\n", val));
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}
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}
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else if (hdr == nsHttp::Content_Type) {
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LOG(("ParseContentType [type=%s]\n", val));
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bool dummy;
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net_ParseContentType(nsDependentCString(val),
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mContentType, mContentCharset, &dummy);
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}
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else if (hdr == nsHttp::Cache_Control)
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ParseCacheControl(val);
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else if (hdr == nsHttp::Pragma)
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ParsePragma(val);
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return NS_OK;
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}
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// From section 13.2.3 of RFC2616, we compute the current age of a cached
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// response as follows:
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//
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// currentAge = max(max(0, responseTime - dateValue), ageValue)
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// + now - requestTime
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//
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// where responseTime == now
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//
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// This is typically a very small number.
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//
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nsresult
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nsHttpResponseHead::ComputeCurrentAge(uint32_t now,
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uint32_t requestTime,
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uint32_t *result) const
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{
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uint32_t dateValue;
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uint32_t ageValue;
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*result = 0;
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if (NS_FAILED(GetDateValue(&dateValue))) {
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LOG(("nsHttpResponseHead::ComputeCurrentAge [this=%x] "
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"Date response header not set!\n", this));
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// Assume we have a fast connection and that our clock
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// is in sync with the server.
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dateValue = now;
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}
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// Compute apparent age
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if (now > dateValue)
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*result = now - dateValue;
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// Compute corrected received age
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if (NS_SUCCEEDED(GetAgeValue(&ageValue)))
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*result = NS_MAX(*result, ageValue);
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NS_ASSERTION(now >= requestTime, "bogus request time");
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// Compute current age
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*result += (now - requestTime);
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return NS_OK;
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}
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// From section 13.2.4 of RFC2616, we compute the freshness lifetime of a cached
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// response as follows:
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//
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// freshnessLifetime = max_age_value
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// <or>
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// freshnessLifetime = expires_value - date_value
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// <or>
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// freshnessLifetime = (date_value - last_modified_value) * 0.10
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// <or>
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// freshnessLifetime = 0
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//
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nsresult
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nsHttpResponseHead::ComputeFreshnessLifetime(uint32_t *result) const
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{
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*result = 0;
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// Try HTTP/1.1 style max-age directive...
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if (NS_SUCCEEDED(GetMaxAgeValue(result)))
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return NS_OK;
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*result = 0;
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uint32_t date = 0, date2 = 0;
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if (NS_FAILED(GetDateValue(&date)))
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date = NowInSeconds(); // synthesize a date header if none exists
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// Try HTTP/1.0 style expires header...
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if (NS_SUCCEEDED(GetExpiresValue(&date2))) {
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if (date2 > date)
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*result = date2 - date;
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// the Expires header can specify a date in the past.
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return NS_OK;
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}
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// Fallback on heuristic using last modified header...
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if (NS_SUCCEEDED(GetLastModifiedValue(&date2))) {
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LOG(("using last-modified to determine freshness-lifetime\n"));
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LOG(("last-modified = %u, date = %u\n", date2, date));
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if (date2 <= date) {
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// this only makes sense if last-modified is actually in the past
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*result = (date - date2) / 10;
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return NS_OK;
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}
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}
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// These responses can be cached indefinitely.
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if ((mStatus == 300) || (mStatus == 301)) {
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*result = uint32_t(-1);
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return NS_OK;
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}
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LOG(("nsHttpResponseHead::ComputeFreshnessLifetime [this = %x] "
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"Insufficient information to compute a non-zero freshness "
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"lifetime!\n", this));
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return NS_OK;
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}
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bool
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nsHttpResponseHead::MustValidate() const
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{
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LOG(("nsHttpResponseHead::MustValidate ??\n"));
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// Some response codes are cacheable, but the rest are not. This switch
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// should stay in sync with the list in nsHttpChannel::ProcessResponse
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switch (mStatus) {
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// Success codes
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case 200:
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case 203:
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case 206:
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// Cacheable redirects
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case 300:
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case 301:
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case 302:
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case 304:
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case 307:
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case 308:
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break;
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// Uncacheable redirects
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case 303:
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case 305:
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// Other known errors
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case 401:
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case 407:
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case 412:
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case 416:
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default: // revalidate unknown error pages
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LOG(("Must validate since response is an uncacheable error page\n"));
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return true;
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}
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// The no-cache response header indicates that we must validate this
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// cached response before reusing.
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if (NoCache()) {
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LOG(("Must validate since response contains 'no-cache' header\n"));
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return true;
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}
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// Likewise, if the response is no-store, then we must validate this
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// cached response before reusing. NOTE: it may seem odd that a no-store
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// response may be cached, but indeed all responses are cached in order
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// to support File->SaveAs, View->PageSource, and other browser features.
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if (NoStore()) {
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LOG(("Must validate since response contains 'no-store' header\n"));
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return true;
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}
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// Compare the Expires header to the Date header. If the server sent an
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// Expires header with a timestamp in the past, then we must validate this
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// cached response before reusing.
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if (ExpiresInPast()) {
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LOG(("Must validate since Expires < Date\n"));
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return true;
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}
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LOG(("no mandatory validation requirement\n"));
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return false;
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}
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bool
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nsHttpResponseHead::MustValidateIfExpired() const
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{
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// according to RFC2616, section 14.9.4:
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//
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// When the must-revalidate directive is present in a response received by a
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// cache, that cache MUST NOT use the entry after it becomes stale to respond to
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// a subsequent request without first revalidating it with the origin server.
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//
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return HasHeaderValue(nsHttp::Cache_Control, "must-revalidate");
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}
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bool
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nsHttpResponseHead::IsResumable() const
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{
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// even though some HTTP/1.0 servers may support byte range requests, we're not
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// going to bother with them, since those servers wouldn't understand If-Range.
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// Also, while in theory it may be possible to resume when the status code
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// is not 200, it is unlikely to be worth the trouble, especially for
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// non-2xx responses.
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return mStatus == 200 &&
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mVersion >= NS_HTTP_VERSION_1_1 &&
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PeekHeader(nsHttp::Content_Length) &&
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(PeekHeader(nsHttp::ETag) || PeekHeader(nsHttp::Last_Modified)) &&
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HasHeaderValue(nsHttp::Accept_Ranges, "bytes");
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}
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bool
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nsHttpResponseHead::ExpiresInPast() const
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{
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uint32_t maxAgeVal, expiresVal, dateVal;
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// Bug #203271. Ensure max-age directive takes precedence over Expires
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if (NS_SUCCEEDED(GetMaxAgeValue(&maxAgeVal))) {
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return false;
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}
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return NS_SUCCEEDED(GetExpiresValue(&expiresVal)) &&
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NS_SUCCEEDED(GetDateValue(&dateVal)) &&
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expiresVal < dateVal;
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}
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nsresult
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nsHttpResponseHead::UpdateHeaders(const nsHttpHeaderArray &headers)
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{
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LOG(("nsHttpResponseHead::UpdateHeaders [this=%x]\n", this));
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uint32_t i, count = headers.Count();
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for (i=0; i<count; ++i) {
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nsHttpAtom header;
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const char *val = headers.PeekHeaderAt(i, header);
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if (!val) {
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continue;
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}
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// Ignore any hop-by-hop headers...
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if (header == nsHttp::Connection ||
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header == nsHttp::Proxy_Connection ||
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header == nsHttp::Keep_Alive ||
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header == nsHttp::Proxy_Authenticate ||
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header == nsHttp::Proxy_Authorization || // not a response header!
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header == nsHttp::TE ||
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header == nsHttp::Trailer ||
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header == nsHttp::Transfer_Encoding ||
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header == nsHttp::Upgrade ||
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// Ignore any non-modifiable headers...
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header == nsHttp::Content_Location ||
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header == nsHttp::Content_MD5 ||
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header == nsHttp::ETag ||
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// Assume Cache-Control: "no-transform"
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header == nsHttp::Content_Encoding ||
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header == nsHttp::Content_Range ||
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header == nsHttp::Content_Type ||
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// Ignore wacky headers too...
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// this one is for MS servers that send "Content-Length: 0"
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// on 304 responses
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header == nsHttp::Content_Length) {
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LOG(("ignoring response header [%s: %s]\n", header.get(), val));
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}
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else {
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LOG(("new response header [%s: %s]\n", header.get(), val));
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// overwrite the current header value with the new value...
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SetHeader(header, nsDependentCString(val));
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}
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}
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return NS_OK;
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}
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void
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nsHttpResponseHead::Reset()
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{
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LOG(("nsHttpResponseHead::Reset\n"));
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ClearHeaders();
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mVersion = NS_HTTP_VERSION_1_1;
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mStatus = 200;
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mContentLength = LL_MAXUINT;
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mCacheControlNoStore = false;
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mCacheControlNoCache = false;
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mPragmaNoCache = false;
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mStatusText.Truncate();
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mContentType.Truncate();
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mContentCharset.Truncate();
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}
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nsresult
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nsHttpResponseHead::ParseDateHeader(nsHttpAtom header, uint32_t *result) const
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{
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const char *val = PeekHeader(header);
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if (!val)
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return NS_ERROR_NOT_AVAILABLE;
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PRTime time;
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PRStatus st = PR_ParseTimeString(val, true, &time);
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if (st != PR_SUCCESS)
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return NS_ERROR_NOT_AVAILABLE;
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*result = PRTimeToSeconds(time);
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return NS_OK;
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}
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nsresult
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nsHttpResponseHead::GetAgeValue(uint32_t *result) const
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{
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const char *val = PeekHeader(nsHttp::Age);
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if (!val)
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return NS_ERROR_NOT_AVAILABLE;
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*result = (uint32_t) atoi(val);
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return NS_OK;
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}
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// Return the value of the (HTTP 1.1) max-age directive, which itself is a
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// component of the Cache-Control response header
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nsresult
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nsHttpResponseHead::GetMaxAgeValue(uint32_t *result) const
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{
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const char *val = PeekHeader(nsHttp::Cache_Control);
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if (!val)
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return NS_ERROR_NOT_AVAILABLE;
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const char *p = PL_strcasestr(val, "max-age=");
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if (!p)
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return NS_ERROR_NOT_AVAILABLE;
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int maxAgeValue = atoi(p + 8);
|
|
if (maxAgeValue < 0)
|
|
maxAgeValue = 0;
|
|
*result = uint32_t(maxAgeValue);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsHttpResponseHead::GetExpiresValue(uint32_t *result) const
|
|
{
|
|
const char *val = PeekHeader(nsHttp::Expires);
|
|
if (!val)
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
PRTime time;
|
|
PRStatus st = PR_ParseTimeString(val, true, &time);
|
|
if (st != PR_SUCCESS) {
|
|
// parsing failed... RFC 2616 section 14.21 says we should treat this
|
|
// as an expiration time in the past.
|
|
*result = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (LL_CMP(time, <, LL_Zero()))
|
|
*result = 0;
|
|
else
|
|
*result = PRTimeToSeconds(time);
|
|
return NS_OK;
|
|
}
|
|
|
|
int64_t
|
|
nsHttpResponseHead::TotalEntitySize() const
|
|
{
|
|
const char* contentRange = PeekHeader(nsHttp::Content_Range);
|
|
if (!contentRange)
|
|
return ContentLength();
|
|
|
|
// Total length is after a slash
|
|
const char* slash = strrchr(contentRange, '/');
|
|
if (!slash)
|
|
return -1; // No idea what the length is
|
|
|
|
slash++;
|
|
if (*slash == '*') // Server doesn't know the length
|
|
return -1;
|
|
|
|
int64_t size;
|
|
if (!nsHttp::ParseInt64(slash, &size))
|
|
size = LL_MAXUINT;
|
|
return size;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// nsHttpResponseHead <private>
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void
|
|
nsHttpResponseHead::ParseVersion(const char *str)
|
|
{
|
|
// Parse HTTP-Version:: "HTTP" "/" 1*DIGIT "." 1*DIGIT
|
|
|
|
LOG(("nsHttpResponseHead::ParseVersion [version=%s]\n", str));
|
|
|
|
// make sure we have HTTP at the beginning
|
|
if (PL_strncasecmp(str, "HTTP", 4) != 0) {
|
|
LOG(("looks like a HTTP/0.9 response\n"));
|
|
mVersion = NS_HTTP_VERSION_0_9;
|
|
return;
|
|
}
|
|
str += 4;
|
|
|
|
if (*str != '/') {
|
|
LOG(("server did not send a version number; assuming HTTP/1.0\n"));
|
|
// NCSA/1.5.2 has a bug in which it fails to send a version number
|
|
// if the request version is HTTP/1.1, so we fall back on HTTP/1.0
|
|
mVersion = NS_HTTP_VERSION_1_0;
|
|
return;
|
|
}
|
|
|
|
char *p = PL_strchr(str, '.');
|
|
if (p == nullptr) {
|
|
LOG(("mal-formed server version; assuming HTTP/1.0\n"));
|
|
mVersion = NS_HTTP_VERSION_1_0;
|
|
return;
|
|
}
|
|
|
|
++p; // let b point to the minor version
|
|
|
|
int major = atoi(str + 1);
|
|
int minor = atoi(p);
|
|
|
|
if ((major > 1) || ((major == 1) && (minor >= 1)))
|
|
// at least HTTP/1.1
|
|
mVersion = NS_HTTP_VERSION_1_1;
|
|
else
|
|
// treat anything else as version 1.0
|
|
mVersion = NS_HTTP_VERSION_1_0;
|
|
}
|
|
|
|
void
|
|
nsHttpResponseHead::ParseCacheControl(const char *val)
|
|
{
|
|
if (!(val && *val)) {
|
|
// clear flags
|
|
mCacheControlNoCache = false;
|
|
mCacheControlNoStore = false;
|
|
return;
|
|
}
|
|
|
|
// search header value for occurrence(s) of "no-cache" but ignore
|
|
// occurrence(s) of "no-cache=blah"
|
|
if (nsHttp::FindToken(val, "no-cache", HTTP_HEADER_VALUE_SEPS))
|
|
mCacheControlNoCache = true;
|
|
|
|
// search header value for occurrence of "no-store"
|
|
if (nsHttp::FindToken(val, "no-store", HTTP_HEADER_VALUE_SEPS))
|
|
mCacheControlNoStore = true;
|
|
}
|
|
|
|
void
|
|
nsHttpResponseHead::ParsePragma(const char *val)
|
|
{
|
|
LOG(("nsHttpResponseHead::ParsePragma [val=%s]\n", val));
|
|
|
|
if (!(val && *val)) {
|
|
// clear no-cache flag
|
|
mPragmaNoCache = false;
|
|
return;
|
|
}
|
|
|
|
// Although 'Pragma: no-cache' is not a standard HTTP response header (it's
|
|
// a request header), caching is inhibited when this header is present so
|
|
// as to match existing Navigator behavior.
|
|
if (nsHttp::FindToken(val, "no-cache", HTTP_HEADER_VALUE_SEPS))
|
|
mPragmaNoCache = true;
|
|
}
|