1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/** **************************************************************************
* response_haeders_handler.c
*
* Copyright 2008 Bryan Ischo <bryan@ischo.com>
*
* This program 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; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 along
* with this program; if not, write to the
*
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
************************************************************************** **/
#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 (isblank(*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) && isblank(*end)) {
end--;
}
if (!isblank(*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 (isblank(*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
if (curl_easy_getinfo
(curl, CURLINFO_FILETIME,
&(handler->responseProperties.lastModified)) != CURLE_OK) {
handler->responseProperties.lastModified = -1;
}
handler->done = 1;
}
|
