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/** **************************************************************************
* response_headers_handler.c
*
* Copyright 2008 Bryan Ischo <bryan@ischo.com>
*
* This file is part of libs3.
*
* libs3 is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, version 3 of the License.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of this library and its programs with the
* OpenSSL library, and distribute linked combinations including the two.
*
* libs3 is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License version 3
* along with libs3, in a file named COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
************************************************************************** **/
#include <ctype.h>
#include <string.h>
#include "response_headers_handler.h"
void response_headers_handler_initialize(ResponseHeadersHandler *handler)
{
handler->responseProperties.requestId = 0;
handler->responseProperties.requestId2 = 0;
handler->responseProperties.contentType = 0;
handler->responseProperties.contentLength = 0;
handler->responseProperties.server = 0;
handler->responseProperties.eTag = 0;
handler->responseProperties.lastModified = -1;
handler->responseProperties.metaDataCount = 0;
handler->responseProperties.metaData = 0;
handler->done = 0;
string_multibuffer_initialize(handler->responsePropertyStrings);
string_multibuffer_initialize(handler->responseMetaDataStrings);
}
void response_headers_handler_add(ResponseHeadersHandler *handler,
char *header, int len)
{
S3ResponseProperties *responseProperties = &(handler->responseProperties);
char *end = &(header[len]);
// Curl might call back the header function after the body has been
// received, for 'chunked encoded' contents. We don't handle this as of
// yet, and it's not clear that it would ever be useful.
if (handler->done) {
return;
}
// If we've already filled up the response headers, ignore this data.
// This sucks, but it shouldn't happen - S3 should not be sending back
// really long headers.
if (handler->responsePropertyStringsSize ==
(sizeof(handler->responsePropertyStrings) - 1)) {
return;
}
// It should not be possible to have a header line less than 3 long
if (len < 3) {
return;
}
// Skip whitespace at beginning of header; there never should be any,
// but just to be safe
while (is_blank(*header)) {
header++;
}
// The header must end in \r\n, so skip back over it, and also over any
// trailing whitespace
end -= 3;
while ((end > header) && is_blank(*end)) {
end--;
}
if (!is_blank(*end)) {
end++;
}
if (end == header) {
// totally bogus
return;
}
*end = 0;
// Find the colon to split the header up
char *c = header;
while (*c && (*c != ':')) {
c++;
}
int namelen = c - header;
// Now walk c past the colon
c++;
// Now skip whitespace to the beginning of the value
while (is_blank(*c)) {
c++;
}
int valuelen = (end - c) + 1, fit;
if (!strncmp(header, "x-amz-request-id", namelen)) {
responseProperties->requestId =
string_multibuffer_current(handler->responsePropertyStrings);
string_multibuffer_add(handler->responsePropertyStrings, c,
valuelen, fit);
}
else if (!strncmp(header, "x-amz-id-2", namelen)) {
responseProperties->requestId2 =
string_multibuffer_current(handler->responsePropertyStrings);
string_multibuffer_add(handler->responsePropertyStrings, c,
valuelen, fit);
}
else if (!strncmp(header, "Content-Type", namelen)) {
responseProperties->contentType =
string_multibuffer_current(handler->responsePropertyStrings);
string_multibuffer_add(handler->responsePropertyStrings, c,
valuelen, fit);
}
else if (!strncmp(header, "Content-Length", namelen)) {
handler->responseProperties.contentLength = 0;
while (*c) {
handler->responseProperties.contentLength *= 10;
handler->responseProperties.contentLength += (*c++ - '0');
}
}
else if (!strncmp(header, "Server", namelen)) {
responseProperties->server =
string_multibuffer_current(handler->responsePropertyStrings);
string_multibuffer_add(handler->responsePropertyStrings, c,
valuelen, fit);
}
else if (!strncmp(header, "ETag", namelen)) {
responseProperties->eTag =
string_multibuffer_current(handler->responsePropertyStrings);
string_multibuffer_add(handler->responsePropertyStrings, c,
valuelen, fit);
}
else if (!strncmp(header, S3_METADATA_HEADER_NAME_PREFIX,
sizeof(S3_METADATA_HEADER_NAME_PREFIX) - 1)) {
// Make sure there is room for another x-amz-meta header
if (handler->responseProperties.metaDataCount ==
sizeof(handler->responseMetaData)) {
return;
}
// Copy the name in
char *metaName = &(header[sizeof(S3_METADATA_HEADER_NAME_PREFIX) - 1]);
int metaNameLen =
(namelen - (sizeof(S3_METADATA_HEADER_NAME_PREFIX) - 1));
char *copiedName =
string_multibuffer_current(handler->responseMetaDataStrings);
string_multibuffer_add(handler->responseMetaDataStrings, metaName,
metaNameLen, fit);
if (!fit) {
return;
}
// Copy the value in
char *copiedValue =
string_multibuffer_current(handler->responseMetaDataStrings);
string_multibuffer_add(handler->responseMetaDataStrings,
c, valuelen, fit);
if (!fit) {
return;
}
if (!handler->responseProperties.metaDataCount) {
handler->responseProperties.metaData =
handler->responseMetaData;
}
S3NameValue *metaHeader =
&(handler->responseMetaData
[handler->responseProperties.metaDataCount++]);
metaHeader->name = copiedName;
metaHeader->value = copiedValue;
}
}
void response_headers_handler_done(ResponseHeadersHandler *handler, CURL *curl)
{
// Now get the last modification time from curl, since it's easiest to let
// curl parse it
time_t lastModified;
if (curl_easy_getinfo
(curl, CURLINFO_FILETIME, &lastModified) == CURLE_OK) {
handler->responseProperties.lastModified = lastModified;
}
handler->done = 1;
}
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