1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 #include "tool_setup.h"
25
26 #define ENABLE_CURLX_PRINTF
27
28 /* use our own printf() functions */
29 #include "curlx.h"
30 #include "tool_cfgable.h"
31 #include "tool_writeout_json.h"
32 #include "tool_writeout.h"
33
34 #define MAX_JSON_STRING 100000
35
36 /* provide the given string in dynbuf as a quoted json string, but without the
37 outer quotes. The buffer is not inited by this function.
38
39 Return 0 on success, non-zero on error.
40 */
jsonquoted(const char * in,size_t len,struct curlx_dynbuf * out,bool lowercase)41 int jsonquoted(const char *in, size_t len,
42 struct curlx_dynbuf *out, bool lowercase)
43 {
44 const unsigned char *i = (unsigned char *)in;
45 const unsigned char *in_end = &i[len];
46 CURLcode result = CURLE_OK;
47
48 for(; (i < in_end) && !result; i++) {
49 switch(*i) {
50 case '\\':
51 result = curlx_dyn_addn(out, "\\\\", 2);
52 break;
53 case '\"':
54 result = curlx_dyn_addn(out, "\\\"", 2);
55 break;
56 case '\b':
57 result = curlx_dyn_addn(out, "\\b", 2);
58 break;
59 case '\f':
60 result = curlx_dyn_addn(out, "\\f", 2);
61 break;
62 case '\n':
63 result = curlx_dyn_addn(out, "\\n", 2);
64 break;
65 case '\r':
66 result = curlx_dyn_addn(out, "\\r", 2);
67 break;
68 case '\t':
69 result = curlx_dyn_addn(out, "\\t", 2);
70 break;
71 default:
72 if(*i < 32)
73 result = curlx_dyn_addf(out, "\\u%04x", *i);
74 else {
75 char o = *i;
76 if(lowercase && (o >= 'A' && o <= 'Z'))
77 /* do not use tolower() since that's locale specific */
78 o |= ('a' - 'A');
79 result = curlx_dyn_addn(out, &o, 1);
80 }
81 break;
82 }
83 }
84 if(result)
85 return (int)result;
86 return 0;
87 }
88
jsonWriteString(FILE * stream,const char * in,bool lowercase)89 void jsonWriteString(FILE *stream, const char *in, bool lowercase)
90 {
91 struct curlx_dynbuf out;
92 curlx_dyn_init(&out, MAX_JSON_STRING);
93
94 if(!jsonquoted(in, strlen(in), &out, lowercase)) {
95 fputc('\"', stream);
96 if(curlx_dyn_len(&out))
97 fputs(curlx_dyn_ptr(&out), stream);
98 fputc('\"', stream);
99 }
100 curlx_dyn_free(&out);
101 }
102
ourWriteOutJSON(FILE * stream,const struct writeoutvar mappings[],struct per_transfer * per,CURLcode per_result)103 void ourWriteOutJSON(FILE *stream, const struct writeoutvar mappings[],
104 struct per_transfer *per, CURLcode per_result)
105 {
106 int i;
107
108 fputs("{", stream);
109
110 for(i = 0; mappings[i].name != NULL; i++) {
111 if(mappings[i].writefunc &&
112 mappings[i].writefunc(stream, &mappings[i], per, per_result, true))
113 fputs(",", stream);
114 }
115
116 /* The variables are sorted in alphabetical order but as a special case
117 curl_version (which is not actually a --write-out variable) is last. */
118 fprintf(stream, "\"curl_version\":");
119 jsonWriteString(stream, curl_version(), FALSE);
120 fprintf(stream, "}");
121 }
122
123 #ifdef _MSC_VER
124 /* warning C4706: assignment within conditional expression */
125 #pragma warning(disable:4706)
126 #endif
127
headerJSON(FILE * stream,struct per_transfer * per)128 void headerJSON(FILE *stream, struct per_transfer *per)
129 {
130 struct curl_header *header;
131 struct curl_header *prev = NULL;
132
133 fputc('{', stream);
134 while((header = curl_easy_nextheader(per->curl, CURLH_HEADER, -1,
135 prev))) {
136 if(header->amount > 1) {
137 if(!header->index) {
138 /* act on the 0-index entry and pull the others in, then output in a
139 JSON list */
140 size_t a = header->amount;
141 size_t i = 0;
142 char *name = header->name;
143 if(prev)
144 fputs(",\n", stream);
145 jsonWriteString(stream, header->name, TRUE);
146 fputc(':', stream);
147 prev = header;
148 fputc('[', stream);
149 do {
150 jsonWriteString(stream, header->value, FALSE);
151 if(++i >= a)
152 break;
153 fputc(',', stream);
154 if(curl_easy_header(per->curl, name, i, CURLH_HEADER,
155 -1, &header))
156 break;
157 } while(1);
158 fputc(']', stream);
159 }
160 }
161 else {
162 if(prev)
163 fputs(",\n", stream);
164 jsonWriteString(stream, header->name, TRUE);
165 fputc(':', stream);
166 fputc('[', stream);
167 jsonWriteString(stream, header->value, FALSE);
168 fputc(']', stream);
169 prev = header;
170 }
171 }
172 fputs("\n}", stream);
173 }
174
