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- /***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2019, 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"
- #include "strcase.h"
- #define ENABLE_CURLX_PRINTF
- /* use our own printf() functions */
- #include "curlx.h"
- #include "tool_cfgable.h"
- #include "tool_doswin.h"
- #include "tool_msgs.h"
- #include "tool_cb_hdr.h"
- #include "tool_cb_wrt.h"
- #include "tool_operate.h"
- #include "memdebug.h" /* keep this as LAST include */
- static char *parse_filename(const char *ptr, size_t len);
- #ifdef WIN32
- #define BOLD
- #define BOLDOFF
- #else
- #define BOLD "\x1b[1m"
- /* Switch off bold by setting "all attributes off" since the explicit
- bold-off code (21) isn't supported everywhere - like in the mac
- Terminal. */
- #define BOLDOFF "\x1b[0m"
- #endif
- /*
- ** callback for CURLOPT_HEADERFUNCTION
- */
- size_t tool_header_cb(char *ptr, size_t size, size_t nmemb, void *userdata)
- {
- struct per_transfer *per = userdata;
- struct HdrCbData *hdrcbdata = &per->hdrcbdata;
- struct OutStruct *outs = &per->outs;
- struct OutStruct *heads = &per->heads;
- const char *str = ptr;
- const size_t cb = size * nmemb;
- const char *end = (char *)ptr + cb;
- long protocol = 0;
- /*
- * Once that libcurl has called back tool_header_cb() the returned value
- * is checked against the amount that was intended to be written, if
- * it does not match then it fails with CURLE_WRITE_ERROR. So at this
- * point returning a value different from sz*nmemb indicates failure.
- */
- size_t failure = (size && nmemb) ? 0 : 1;
- if(!heads->config)
- return failure;
- #ifdef DEBUGBUILD
- if(size * nmemb > (size_t)CURL_MAX_HTTP_HEADER) {
- warnf(heads->config->global, "Header data exceeds single call write "
- "limit!\n");
- return failure;
- }
- #endif
- /*
- * Write header data when curl option --dump-header (-D) is given.
- */
- if(heads->config->headerfile && heads->stream) {
- size_t rc = fwrite(ptr, size, nmemb, heads->stream);
- if(rc != cb)
- return rc;
- /* flush the stream to send off what we got earlier */
- (void)fflush(heads->stream);
- }
- /*
- * This callback sets the filename where output shall be written when
- * curl options --remote-name (-O) and --remote-header-name (-J) have
- * been simultaneously given and additionally server returns an HTTP
- * Content-Disposition header specifying a filename property.
- */
- curl_easy_getinfo(per->curl, CURLINFO_PROTOCOL, &protocol);
- if(hdrcbdata->honor_cd_filename &&
- (cb > 20) && checkprefix("Content-disposition:", str) &&
- (protocol & (CURLPROTO_HTTPS|CURLPROTO_HTTP))) {
- const char *p = str + 20;
- /* look for the 'filename=' parameter
- (encoded filenames (*=) are not supported) */
- for(;;) {
- char *filename;
- size_t len;
- while(*p && (p < end) && !ISALPHA(*p))
- p++;
- if(p > end - 9)
- break;
- if(memcmp(p, "filename=", 9)) {
- /* no match, find next parameter */
- while((p < end) && (*p != ';'))
- p++;
- continue;
- }
- p += 9;
- /* this expression below typecasts 'cb' only to avoid
- warning: signed and unsigned type in conditional expression
- */
- len = (ssize_t)cb - (p - str);
- filename = parse_filename(p, len);
- if(filename) {
- if(outs->stream) {
- int rc;
- /* already opened and possibly written to */
- if(outs->fopened)
- fclose(outs->stream);
- outs->stream = NULL;
- /* rename the initial file name to the new file name */
- rc = rename(outs->filename, filename);
- if(rc != 0) {
- warnf(outs->config->global, "Failed to rename %s -> %s: %s\n",
- outs->filename, filename, strerror(errno));
- }
- if(outs->alloc_filename)
- Curl_safefree(outs->filename);
- if(rc != 0) {
- free(filename);
- return failure;
- }
- }
- outs->is_cd_filename = TRUE;
- outs->s_isreg = TRUE;
- outs->fopened = FALSE;
- outs->filename = filename;
- outs->alloc_filename = TRUE;
- hdrcbdata->honor_cd_filename = FALSE; /* done now! */
- if(!tool_create_output_file(outs))
- return failure;
- }
- break;
- }
- if(!outs->stream && !tool_create_output_file(outs))
- return failure;
- }
- if(hdrcbdata->config->show_headers &&
- (protocol &
- (CURLPROTO_HTTP|CURLPROTO_HTTPS|CURLPROTO_RTSP|CURLPROTO_FILE))) {
- /* bold headers only for selected protocols */
- char *value = NULL;
- if(!outs->stream && !tool_create_output_file(outs))
- return failure;
- if(hdrcbdata->global->isatty && hdrcbdata->global->styled_output)
- value = memchr(ptr, ':', cb);
- if(value) {
- size_t namelen = value - ptr;
- fprintf(outs->stream, BOLD "%.*s" BOLDOFF ":", namelen, ptr);
- fwrite(&value[1], cb - namelen - 1, 1, outs->stream);
- }
- else
- /* not "handled", just show it */
- fwrite(ptr, cb, 1, outs->stream);
- }
- return cb;
- }
- /*
- * Copies a file name part and returns an ALLOCATED data buffer.
- */
- static char *parse_filename(const char *ptr, size_t len)
- {
- char *copy;
- char *p;
- char *q;
- char stop = '\0';
- /* simple implementation of strndup() */
- copy = malloc(len + 1);
- if(!copy)
- return NULL;
- memcpy(copy, ptr, len);
- copy[len] = '\0';
- p = copy;
- if(*p == '\'' || *p == '"') {
- /* store the starting quote */
- stop = *p;
- p++;
- }
- else
- stop = ';';
- /* scan for the end letter and stop there */
- q = strchr(p, stop);
- if(q)
- *q = '\0';
- /* if the filename contains a path, only use filename portion */
- q = strrchr(p, '/');
- if(q) {
- p = q + 1;
- if(!*p) {
- Curl_safefree(copy);
- return NULL;
- }
- }
- /* If the filename contains a backslash, only use filename portion. The idea
- is that even systems that don't handle backslashes as path separators
- probably want the path removed for convenience. */
- q = strrchr(p, '\\');
- if(q) {
- p = q + 1;
- if(!*p) {
- Curl_safefree(copy);
- return NULL;
- }
- }
- /* make sure the file name doesn't end in \r or \n */
- q = strchr(p, '\r');
- if(q)
- *q = '\0';
- q = strchr(p, '\n');
- if(q)
- *q = '\0';
- if(copy != p)
- memmove(copy, p, strlen(p) + 1);
- #if defined(MSDOS) || defined(WIN32)
- {
- char *sanitized;
- SANITIZEcode sc = sanitize_file_name(&sanitized, copy, 0);
- Curl_safefree(copy);
- if(sc)
- return NULL;
- copy = sanitized;
- }
- #endif /* MSDOS || WIN32 */
- /* in case we built debug enabled, we allow an environment variable
- * named CURL_TESTDIR to prefix the given file name to put it into a
- * specific directory
- */
- #ifdef DEBUGBUILD
- {
- char *tdir = curlx_getenv("CURL_TESTDIR");
- if(tdir) {
- char buffer[512]; /* suitably large */
- msnprintf(buffer, sizeof(buffer), "%s/%s", tdir, copy);
- Curl_safefree(copy);
- copy = strdup(buffer); /* clone the buffer, we don't use the libcurl
- aprintf() or similar since we want to use the
- same memory code as the "real" parse_filename
- function */
- curl_free(tdir);
- }
- }
- #endif
- return copy;
- }
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