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curl/src/tool_writeout.c
Mathias Gumz 04c03416e6
writeout: support to generate JSON output 
This commit adds support to generate JSON via the writeout feature:

    -w "%{json}"

It leverages the existing infrastructure as much as possible. Thus,
generating the JSON on STDERR is possible by:

    -w "%{stderr}%{json}"

This implements a variant of
https://github.com/curl/curl/wiki/JSON#--write-out-json.

Closes #4870
2020-03-17 15:01:28 +01:00

379 lines
14 KiB
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "tool_setup.h"
#define ENABLE_CURLX_PRINTF
/* use our own printf() functions */
#include "curlx.h"
#include "tool_cfgable.h"
#include "tool_writeout.h"
#include "tool_writeout_json.h"
#include "memdebug.h" /* keep this as LAST include */
static const struct writeoutvar variables[] = {
{"url_effective", VAR_EFFECTIVE_URL, 0,
CURLINFO_EFFECTIVE_URL, JSON_STRING},
{"http_code", VAR_HTTP_CODE, 0,
CURLINFO_RESPONSE_CODE, JSON_LONG},
{"response_code", VAR_HTTP_CODE, 0,
CURLINFO_RESPONSE_CODE, JSON_LONG},
{"http_connect", VAR_HTTP_CODE_PROXY, 0,
CURLINFO_HTTP_CONNECTCODE, JSON_LONG},
{"time_total", VAR_TOTAL_TIME, 0,
CURLINFO_TOTAL_TIME_T, JSON_TIME},
{"time_namelookup", VAR_NAMELOOKUP_TIME, 0,
CURLINFO_NAMELOOKUP_TIME_T, JSON_TIME},
{"time_connect", VAR_CONNECT_TIME, 0,
CURLINFO_CONNECT_TIME_T, JSON_TIME},
{"time_appconnect", VAR_APPCONNECT_TIME, 0,
CURLINFO_APPCONNECT_TIME_T, JSON_TIME},
{"time_pretransfer", VAR_PRETRANSFER_TIME, 0,
CURLINFO_PRETRANSFER_TIME_T, JSON_TIME},
{"time_starttransfer", VAR_STARTTRANSFER_TIME, 0,
CURLINFO_STARTTRANSFER_TIME_T, JSON_TIME},
{"size_header", VAR_HEADER_SIZE, 0,
CURLINFO_HEADER_SIZE, JSON_LONG},
{"size_request", VAR_REQUEST_SIZE, 0,
CURLINFO_REQUEST_SIZE, JSON_LONG},
{"size_download", VAR_SIZE_DOWNLOAD, 0,
CURLINFO_SIZE_DOWNLOAD_T, JSON_LONG},
{"size_upload", VAR_SIZE_UPLOAD, 0,
CURLINFO_SIZE_UPLOAD_T, JSON_LONG},
{"speed_download", VAR_SPEED_DOWNLOAD, 0,
CURLINFO_SPEED_DOWNLOAD_T, JSON_TIME},
{"speed_upload", VAR_SPEED_UPLOAD, 0,
CURLINFO_SPEED_UPLOAD_T, JSON_TIME},
{"content_type", VAR_CONTENT_TYPE, 0,
CURLINFO_CONTENT_TYPE, JSON_STRING},
{"num_connects", VAR_NUM_CONNECTS, 0,
CURLINFO_NUM_CONNECTS, JSON_LONG},
{"time_redirect", VAR_REDIRECT_TIME, 0,
CURLINFO_REDIRECT_TIME_T, JSON_TIME},
{"num_redirects", VAR_REDIRECT_COUNT, 0,
CURLINFO_REDIRECT_COUNT, JSON_LONG},
{"ftp_entry_path", VAR_FTP_ENTRY_PATH, 0,
CURLINFO_FTP_ENTRY_PATH, JSON_STRING},
{"redirect_url", VAR_REDIRECT_URL, 0,
CURLINFO_REDIRECT_URL, JSON_STRING},
{"ssl_verify_result", VAR_SSL_VERIFY_RESULT, 0,
CURLINFO_SSL_VERIFYRESULT, JSON_LONG},
{"proxy_ssl_verify_result", VAR_PROXY_SSL_VERIFY_RESULT, 0,
CURLINFO_PROXY_SSL_VERIFYRESULT, JSON_LONG},
{"filename_effective", VAR_EFFECTIVE_FILENAME, 0,
0, JSON_FILENAME},
{"remote_ip", VAR_PRIMARY_IP, 0,
CURLINFO_PRIMARY_IP, JSON_STRING},
{"remote_port", VAR_PRIMARY_PORT, 0,
CURLINFO_PRIMARY_PORT, JSON_LONG},
{"local_ip", VAR_LOCAL_IP, 0,
CURLINFO_LOCAL_IP, JSON_STRING},
{"local_port", VAR_LOCAL_PORT, 0,
CURLINFO_LOCAL_PORT, JSON_LONG},
{"http_version", VAR_HTTP_VERSION, 0,
CURLINFO_HTTP_VERSION, JSON_VERSION},
{"scheme", VAR_SCHEME, 0,
CURLINFO_SCHEME, JSON_STRING},
{"stdout", VAR_STDOUT, 1,
0, JSON_NONE},
{"stderr", VAR_STDERR, 1,
0, JSON_NONE},
{"json", VAR_JSON, 1,
0, JSON_NONE},
{NULL, VAR_NONE, 1,
0, JSON_NONE}
};
void ourWriteOut(CURL *curl, struct OutStruct *outs, const char *writeinfo)
{
FILE *stream = stdout;
const char *ptr = writeinfo;
char *stringp = NULL;
long longinfo;
double doubleinfo;
while(ptr && *ptr) {
if('%' == *ptr && ptr[1]) {
if('%' == ptr[1]) {
/* an escaped %-letter */
fputc('%', stream);
ptr += 2;
}
else {
/* this is meant as a variable to output */
char *end;
if('{' == ptr[1]) {
char keepit;
int i;
bool match = FALSE;
end = strchr(ptr, '}');
ptr += 2; /* pass the % and the { */
if(!end) {
fputs("%{", stream);
continue;
}
keepit = *end;
*end = 0; /* zero terminate */
for(i = 0; variables[i].name; i++) {
if(curl_strequal(ptr, variables[i].name)) {
match = TRUE;
switch(variables[i].id) {
case VAR_EFFECTIVE_URL:
if((CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &stringp))
&& stringp)
fputs(stringp, stream);
break;
case VAR_HTTP_CODE:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &longinfo))
fprintf(stream, "%03ld", longinfo);
break;
case VAR_HTTP_CODE_PROXY:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_HTTP_CONNECTCODE,
&longinfo))
fprintf(stream, "%03ld", longinfo);
break;
case VAR_HEADER_SIZE:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_REQUEST_SIZE:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_REQUEST_SIZE, &longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_NUM_CONNECTS:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_NUM_CONNECTS, &longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_REDIRECT_COUNT:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_REDIRECT_COUNT, &longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_REDIRECT_TIME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_REDIRECT_TIME,
&doubleinfo))
fprintf(stream, "%.6f", doubleinfo);
break;
case VAR_TOTAL_TIME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &doubleinfo))
fprintf(stream, "%.6f", doubleinfo);
break;
case VAR_NAMELOOKUP_TIME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_NAMELOOKUP_TIME,
&doubleinfo))
fprintf(stream, "%.6f", doubleinfo);
break;
case VAR_CONNECT_TIME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_CONNECT_TIME, &doubleinfo))
fprintf(stream, "%.6f", doubleinfo);
break;
case VAR_APPCONNECT_TIME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_APPCONNECT_TIME,
&doubleinfo))
fprintf(stream, "%.6f", doubleinfo);
break;
case VAR_PRETRANSFER_TIME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_PRETRANSFER_TIME,
&doubleinfo))
fprintf(stream, "%.6f", doubleinfo);
break;
case VAR_STARTTRANSFER_TIME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_STARTTRANSFER_TIME,
&doubleinfo))
fprintf(stream, "%.6f", doubleinfo);
break;
case VAR_SIZE_UPLOAD:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_SIZE_UPLOAD, &doubleinfo))
fprintf(stream, "%.0f", doubleinfo);
break;
case VAR_SIZE_DOWNLOAD:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD,
&doubleinfo))
fprintf(stream, "%.0f", doubleinfo);
break;
case VAR_SPEED_DOWNLOAD:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD,
&doubleinfo))
fprintf(stream, "%.3f", doubleinfo);
break;
case VAR_SPEED_UPLOAD:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_SPEED_UPLOAD, &doubleinfo))
fprintf(stream, "%.3f", doubleinfo);
break;
case VAR_CONTENT_TYPE:
if((CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &stringp))
&& stringp)
fputs(stringp, stream);
break;
case VAR_FTP_ENTRY_PATH:
if((CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_FTP_ENTRY_PATH, &stringp))
&& stringp)
fputs(stringp, stream);
break;
case VAR_REDIRECT_URL:
if((CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_REDIRECT_URL, &stringp))
&& stringp)
fputs(stringp, stream);
break;
case VAR_SSL_VERIFY_RESULT:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_SSL_VERIFYRESULT,
&longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_PROXY_SSL_VERIFY_RESULT:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_PROXY_SSL_VERIFYRESULT,
&longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_EFFECTIVE_FILENAME:
if(outs->filename)
fprintf(stream, "%s", outs->filename);
break;
case VAR_PRIMARY_IP:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_PRIMARY_IP,
&stringp))
fprintf(stream, "%s", stringp);
break;
case VAR_PRIMARY_PORT:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_PRIMARY_PORT,
&longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_LOCAL_IP:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_LOCAL_IP,
&stringp))
fprintf(stream, "%s", stringp);
break;
case VAR_LOCAL_PORT:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_LOCAL_PORT,
&longinfo))
fprintf(stream, "%ld", longinfo);
break;
case VAR_HTTP_VERSION:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_HTTP_VERSION,
&longinfo)) {
const char *version = "0";
switch(longinfo) {
case CURL_HTTP_VERSION_1_0:
version = "1.0";
break;
case CURL_HTTP_VERSION_1_1:
version = "1.1";
break;
case CURL_HTTP_VERSION_2_0:
version = "2";
break;
case CURL_HTTP_VERSION_3:
version = "3";
break;
}
fprintf(stream, version);
}
break;
case VAR_SCHEME:
if(CURLE_OK ==
curl_easy_getinfo(curl, CURLINFO_SCHEME,
&stringp))
fprintf(stream, "%s", stringp);
break;
case VAR_STDOUT:
stream = stdout;
break;
case VAR_STDERR:
stream = stderr;
break;
case VAR_JSON:
ourWriteOutJSON(variables, curl, outs, stream);
default:
break;
}
break;
}
}
if(!match) {
fprintf(stderr, "curl: unknown --write-out variable: '%s'\n", ptr);
}
ptr = end + 1; /* pass the end */
*end = keepit;
}
else {
/* illegal syntax, then just output the characters that are used */
fputc('%', stream);
fputc(ptr[1], stream);
ptr += 2;
}
}
}
else if('\\' == *ptr && ptr[1]) {
switch(ptr[1]) {
case 'r':
fputc('\r', stream);
break;
case 'n':
fputc('\n', stream);
break;
case 't':
fputc('\t', stream);
break;
default:
/* unknown, just output this */
fputc(*ptr, stream);
fputc(ptr[1], stream);
break;
}
ptr += 2;
}
else {
fputc(*ptr, stream);
ptr++;
}
}
}
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