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a9021716cc
curl/src/tool_cb_dbg.c
Daniel Stenberg dcd6f81025
snprintf: renamed and we now only use msnprintf() 
The function does not return the same value as snprintf() normally does,
so readers may be mislead into thinking the code works differently than
it actually does. A different function name makes this easier to detect.

Reported-by: Tomas Hoger
Assisted-by: Daniel Gustafsson
Fixes #3296
Closes #3297
2018-11-23 08:26:51 +01:00

282 lines
8.3 KiB
C
Raw Blame History

/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2018, 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_convert.h"
#include "tool_msgs.h"
#include "tool_cb_dbg.h"
#include "tool_util.h"
#include "memdebug.h" /* keep this as LAST include */
static void dump(const char *timebuf, const char *text,
FILE *stream, const unsigned char *ptr, size_t size,
trace tracetype, curl_infotype infotype);
/*
** callback for CURLOPT_DEBUGFUNCTION
*/
int tool_debug_cb(CURL *handle, curl_infotype type,
char *data, size_t size,
void *userdata)
{
struct OperationConfig *operation = userdata;
struct GlobalConfig *config = operation->global;
FILE *output = config->errors;
const char *text;
struct timeval tv;
char timebuf[20];
time_t secs;
(void)handle; /* not used */
if(config->tracetime) {
struct tm *now;
static time_t epoch_offset;
static int known_offset;
tv = tvnow();
if(!known_offset) {
epoch_offset = time(NULL) - tv.tv_sec;
known_offset = 1;
}
secs = epoch_offset + tv.tv_sec;
now = localtime(&secs); /* not thread safe but we don't care */
msnprintf(timebuf, sizeof(timebuf), "%02d:%02d:%02d.%06ld ",
now->tm_hour, now->tm_min, now->tm_sec, (long)tv.tv_usec);
}
else
timebuf[0] = 0;
if(!config->trace_stream) {
/* open for append */
if(!strcmp("-", config->trace_dump))
config->trace_stream = stdout;
else if(!strcmp("%", config->trace_dump))
/* Ok, this is somewhat hackish but we do it undocumented for now */
config->trace_stream = config->errors; /* aka stderr */
else {
config->trace_stream = fopen(config->trace_dump, FOPEN_WRITETEXT);
config->trace_fopened = TRUE;
}
}
if(config->trace_stream)
output = config->trace_stream;
if(!output) {
warnf(config, "Failed to create/open output");
return 0;
}
if(config->tracetype == TRACE_PLAIN) {
/*
* This is the trace look that is similar to what libcurl makes on its
* own.
*/
static const char * const s_infotype[] = {
"*", "<", ">", "{", "}", "{", "}"
};
static bool newl = FALSE;
static bool traced_data = FALSE;
switch(type) {
case CURLINFO_HEADER_OUT:
if(size > 0) {
size_t st = 0;
size_t i;
for(i = 0; i < size - 1; i++) {
if(data[i] == '\n') { /* LF */
if(!newl) {
fprintf(output, "%s%s ", timebuf, s_infotype[type]);
}
(void)fwrite(data + st, i - st + 1, 1, output);
st = i + 1;
newl = FALSE;
}
}
if(!newl)
fprintf(output, "%s%s ", timebuf, s_infotype[type]);
(void)fwrite(data + st, i - st + 1, 1, output);
}
newl = (size && (data[size - 1] != '\n')) ? TRUE : FALSE;
traced_data = FALSE;
break;
case CURLINFO_TEXT:
case CURLINFO_HEADER_IN:
if(!newl)
fprintf(output, "%s%s ", timebuf, s_infotype[type]);
(void)fwrite(data, size, 1, output);
newl = (size && (data[size - 1] != '\n')) ? TRUE : FALSE;
traced_data = FALSE;
break;
case CURLINFO_DATA_OUT:
case CURLINFO_DATA_IN:
case CURLINFO_SSL_DATA_IN:
case CURLINFO_SSL_DATA_OUT:
if(!traced_data) {
/* if the data is output to a tty and we're sending this debug trace
to stderr or stdout, we don't display the alert about the data not
being shown as the data _is_ shown then just not via this
function */
if(!config->isatty || ((output != stderr) && (output != stdout))) {
if(!newl)
fprintf(output, "%s%s ", timebuf, s_infotype[type]);
fprintf(output, "[%zu bytes data]\n", size);
newl = FALSE;
traced_data = TRUE;
}
}
break;
default: /* nada */
newl = FALSE;
traced_data = FALSE;
break;
}
return 0;
}
#ifdef CURL_DOES_CONVERSIONS
/* Special processing is needed for CURLINFO_HEADER_OUT blocks
* if they contain both headers and data (separated by CRLFCRLF).
* We dump the header text and then switch type to CURLINFO_DATA_OUT.
*/
if((type == CURLINFO_HEADER_OUT) && (size > 4)) {
size_t i;
for(i = 0; i < size - 4; i++) {
if(memcmp(&data[i], "\r\n\r\n", 4) == 0) {
/* dump everything through the CRLFCRLF as a sent header */
text = "=> Send header";
dump(timebuf, text, output, (unsigned char *)data, i + 4,
config->tracetype, type);
data += i + 3;
size -= i + 4;
type = CURLINFO_DATA_OUT;
data += 1;
break;
}
}
}
#endif /* CURL_DOES_CONVERSIONS */
switch(type) {
case CURLINFO_TEXT:
fprintf(output, "%s== Info: %s", timebuf, data);
/* FALLTHROUGH */
default: /* in case a new one is introduced to shock us */
return 0;
case CURLINFO_HEADER_OUT:
text = "=> Send header";
break;
case CURLINFO_DATA_OUT:
text = "=> Send data";
break;
case CURLINFO_HEADER_IN:
text = "<= Recv header";
break;
case CURLINFO_DATA_IN:
text = "<= Recv data";
break;
case CURLINFO_SSL_DATA_IN:
text = "<= Recv SSL data";
break;
case CURLINFO_SSL_DATA_OUT:
text = "=> Send SSL data";
break;
}
dump(timebuf, text, output, (unsigned char *) data, size, config->tracetype,
type);
return 0;
}
static void dump(const char *timebuf, const char *text,
FILE *stream, const unsigned char *ptr, size_t size,
trace tracetype, curl_infotype infotype)
{
size_t i;
size_t c;
unsigned int width = 0x10;
if(tracetype == TRACE_ASCII)
/* without the hex output, we can fit more on screen */
width = 0x40;
fprintf(stream, "%s%s, %zu bytes (0x%zx)\n", timebuf, text, size, size);
for(i = 0; i < size; i += width) {
fprintf(stream, "%04zx: ", i);
if(tracetype == TRACE_BIN) {
/* hex not disabled, show it */
for(c = 0; c < width; c++)
if(i + c < size)
fprintf(stream, "%02x ", ptr[i + c]);
else
fputs(" ", stream);
}
for(c = 0; (c < width) && (i + c < size); c++) {
/* check for 0D0A; if found, skip past and start a new line of output */
if((tracetype == TRACE_ASCII) &&
(i + c + 1 < size) && (ptr[i + c] == 0x0D) &&
(ptr[i + c + 1] == 0x0A)) {
i += (c + 2 - width);
break;
}
#ifdef CURL_DOES_CONVERSIONS
/* repeat the 0D0A check above but use the host encoding for CRLF */
if((tracetype == TRACE_ASCII) &&
(i + c + 1 < size) && (ptr[i + c] == '\r') &&
(ptr[i + c + 1] == '\n')) {
i += (c + 2 - width);
break;
}
/* convert to host encoding and print this character */
fprintf(stream, "%c", convert_char(infotype, ptr[i + c]));
#else
(void)infotype;
fprintf(stream, "%c", ((ptr[i + c] >= 0x20) && (ptr[i + c] < 0x80)) ?
ptr[i + c] : UNPRINTABLE_CHAR);
#endif /* CURL_DOES_CONVERSIONS */
/* check again for 0D0A, to avoid an extra \n if it's at width */
if((tracetype == TRACE_ASCII) &&
(i + c + 2 < size) && (ptr[i + c + 1] == 0x0D) &&
(ptr[i + c + 2] == 0x0A)) {
i += (c + 3 - width);
break;
}
}
fputc('\n', stream); /* newline */
}
fflush(stream);
}
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