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trurl.c
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trurl.c
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <[email protected]>, 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.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.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include <curl/mprintf.h>
#include <stdint.h>
#if defined(_MSC_VER) && (_MSC_VER < 1800)
typedef enum {
bool_false = 0,
bool_true = 1
} bool;
#define false bool_false
#define true bool_true
#else
#include <stdbool.h>
#endif
#include <locale.h> /* for setlocale() */
#include "version.h"
#ifdef _MSC_VER
#define strdup _strdup
#endif
#if CURL_AT_LEAST_VERSION(7,77,0)
#define SUPPORTS_NORM_IPV4
#endif
#if CURL_AT_LEAST_VERSION(7,81,0)
#define SUPPORTS_ZONEID
#endif
#if CURL_AT_LEAST_VERSION(7,80,0)
#define SUPPORTS_URL_STRERROR
#endif
#if CURL_AT_LEAST_VERSION(7,78,0)
#define SUPPORTS_ALLOW_SPACE
#else
#define CURLU_ALLOW_SPACE 0
#endif
#if CURL_AT_LEAST_VERSION(7,88,0)
#define SUPPORTS_PUNYCODE
#endif
#if CURL_AT_LEAST_VERSION(8,3,0)
#define SUPPORTS_PUNY2IDN
#endif
#if CURL_AT_LEAST_VERSION(7,30,0)
#define SUPPORTS_IMAP_OPTIONS
#endif
#if CURL_AT_LEAST_VERSION(8,9,0)
#define SUPPORTS_NO_GUESS_SCHEME
#else
#define CURLU_NO_GUESS_SCHEME 0
#endif
#define OUTPUT_URL 0 /* default */
#define OUTPUT_SCHEME 1
#define OUTPUT_USER 2
#define OUTPUT_PASSWORD 3
#define OUTPUT_OPTIONS 4
#define OUTPUT_HOST 5
#define OUTPUT_PORT 6
#define OUTPUT_PATH 7
#define OUTPUT_QUERY 8
#define OUTPUT_FRAGMENT 9
#define OUTPUT_ZONEID 10
#define NUM_COMPONENTS 10 /* excluding "url" */
#define PROGNAME "trurl"
#define REPLACE_NULL_BYTE '.' /* for query:key extractions */
enum {
VARMODIFIER_URLENCODED = 1 << 1,
VARMODIFIER_DEFAULT = 1 << 2,
VARMODIFIER_PUNY = 1 << 3,
VARMODIFIER_PUNY2IDN = 1 << 4,
};
struct var {
const char *name;
CURLUPart part;
};
struct string {
char *str;
size_t len;
};
static const struct var variables[] = {
{"scheme", CURLUPART_SCHEME},
{"user", CURLUPART_USER},
{"password", CURLUPART_PASSWORD},
{"options", CURLUPART_OPTIONS},
{"host", CURLUPART_HOST},
{"port", CURLUPART_PORT},
{"path", CURLUPART_PATH},
{"query", CURLUPART_QUERY},
{"fragment", CURLUPART_FRAGMENT},
{"zoneid", CURLUPART_ZONEID},
{NULL, 0}
};
#define ERROR_PREFIX PROGNAME " error: "
#define WARN_PREFIX PROGNAME " note: "
/* error codes */
#define ERROR_FILE 1
#define ERROR_APPEND 2 /* --append mistake */
#define ERROR_ARG 3 /* a command line option misses its argument */
#define ERROR_FLAG 4 /* a command line flag mistake */
#define ERROR_SET 5 /* a --set problem */
#define ERROR_MEM 6 /* out of memory */
#define ERROR_URL 7 /* could not get a URL out of the set components */
#define ERROR_TRIM 8 /* a --trim problem */
#define ERROR_BADURL 9 /* if --verify is set and the URL cannot parse */
#define ERROR_GET 10 /* bad --get syntax */
#define ERROR_ITER 11 /* bad --iterate syntax */
#define ERROR_REPL 12 /* a --replace problem */
#ifndef SUPPORTS_URL_STRERROR
/* provide a fake local mockup */
static char *curl_url_strerror(CURLUcode error)
{
static char buffer[128];
curl_msnprintf(buffer, sizeof(buffer), "URL error %u", (int)error);
return buffer;
}
#endif
/* Mapping table to go from lowercase to uppercase for plain ASCII.*/
static const unsigned char touppermap[256] = {
0, 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, 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, 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, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213,
214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229,
230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245,
246, 247, 248, 249, 250, 251, 252, 253, 254, 255
};
/* Portable, ASCII-consistent toupper. Do not use toupper() because its
behavior is altered by the current locale. */
#define raw_toupper(in) touppermap[(unsigned int)in]
/*
* casecompare() does ASCII based case insensitive checks, as a strncasecmp
* replacement.
*/
static int casecompare(const char *first, const char *second, size_t max)
{
while(*first && *second && max) {
int diff = raw_toupper(*first) - raw_toupper(*second);
if(diff)
/* get out of the loop as soon as they don't match */
return diff;
max--;
first++;
second++;
}
if(!max)
return 0; /* identical to this point */
return raw_toupper(*first) - raw_toupper(*second);
}
#define strncasecmp(x,y,z) casecompare(x,y,z)
static void message_low(const char *prefix, const char *suffix,
const char *fmt, va_list ap)
{
fputs(prefix, stderr);
vfprintf(stderr, fmt, ap);
fputs(suffix, stderr);
}
static void warnf_low(const char *fmt, va_list ap)
{
message_low(WARN_PREFIX, "\n", fmt, ap);
}
static void warnf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
warnf_low(fmt, ap);
va_end(ap);
}
static void help(void)
{
int i;
fputs(
"Usage: " PROGNAME " [options] [URL]\n"
" -a, --append [component]=[data] - append data to component\n"
" --accept-space - give in to this URL abuse\n"
" --curl - only schemes supported by libcurl\n"
" --default-port - add known default ports\n"
" -f, --url-file [file/-] - read URLs from file or stdin\n"
" -g, --get [{component}s] - output component(s)\n"
" -h, --help - this help\n"
" --iterate [component]=[list] - create multiple URL outputs\n"
" --json - output URL as JSON\n"
" --keep-port - keep known default ports\n"
" --no-guess-scheme - require scheme in URLs\n"
" --punycode - encode hostnames in punycode\n"
" --as-idn - encode hostnames in idn\n"
" --query-separator [letter] - if something else than '&'\n"
" --redirect [URL] - redirect to this\n"
" --replace [data] - replaces a query [data]\n"
" --force-replace [data] - appends a new query if not found\n"
" -s, --set [component]=[data] - set component content\n"
" --sort-query - alpha-sort the query pairs\n"
" --trim [component]=[what] - trim component\n"
" --url [URL] - URL to work with\n"
" --urlencode - URL encode components by default\n"
" -v, --version - show version\n"
" --verify - return error on (first) bad URL\n"
" --quiet - Suppress (some) notes and comments\n"
" URL COMPONENTS:\n"
" ", stdout);
fputs("url, ", stdout);
for(i = 0; i< NUM_COMPONENTS ; i++) {
printf("%s%s", i?", ":"", variables[i].name);
}
fputs("\n", stdout);
exit(0);
}
static void show_version(void)
{
curl_version_info_data *data = curl_version_info(CURLVERSION_NOW);
/* puny code isn't guaranteed based on the version, so it must be polled
* from libcurl */
#if defined(SUPPORTS_PUNYCODE) || defined(SUPPORTS_PUNY2IDN)
bool supports_puny = (data->features & CURL_VERSION_IDN) != 0;
#endif
#if defined(SUPPORTS_IMAP_OPTIONS)
bool supports_imap = false;
const char *const *protocol_name = data->protocols;
while(*protocol_name && !supports_imap) {
supports_imap = !strncmp(*protocol_name, "imap", 3);
protocol_name++;
}
#endif
fprintf(stdout, "%s version %s libcurl/%s [built-with %s]\n",
PROGNAME, TRURL_VERSION_TXT, data->version, LIBCURL_VERSION);
fprintf(stdout, "features:");
#ifdef SUPPORTS_IMAP_OPTIONS
if(supports_imap)
fprintf(stdout, " imap-options");
#endif
#ifdef SUPPORTS_NO_GUESS_SCHEME
fprintf(stdout, "no-guess-scheme");
#endif
#ifdef SUPPORTS_NORM_IPV4
fprintf(stdout, " normalize-ipv4");
#endif
#ifdef SUPPORTS_PUNYCODE
if(supports_puny)
fprintf(stdout, " punycode");
#endif
#ifdef SUPPORTS_PUNY2IDN
if(supports_puny)
fprintf(stdout, " punycode2idn");
#endif
#ifdef SUPPORTS_URL_STRERROR
fprintf(stdout, " url-strerror");
#endif
#ifdef SUPPORTS_ALLOW_SPACE
fprintf(stdout, " white-space");
#endif
#ifdef SUPPORTS_ZONEID
fprintf(stdout, " zone-id");
#endif
fprintf(stdout, "\n");
exit(0);
}
struct iterinfo {
CURLU *uh;
const char *part;
size_t plen;
char *ptr;
unsigned int varmask; /* sets 1 << [component] */
};
struct option {
struct curl_slist *url_list;
struct curl_slist *append_path;
struct curl_slist *append_query;
struct curl_slist *set_list;
struct curl_slist *trim_list;
struct curl_slist *iter_list;
struct curl_slist *replace_list;
const char *redirect;
const char *qsep;
const char *format;
FILE *url;
bool urlopen;
bool jsonout;
bool verify;
bool accept_space;
bool curl;
bool default_port;
bool keep_port;
bool punycode;
bool puny2idn;
bool sort_query;
bool no_guess_scheme;
bool urlencode;
bool end_of_options;
bool quiet_warnings;
bool force_replace;
/* -- stats -- */
unsigned int urls;
};
static void trurl_warnf(struct option *o, const char *fmt, ...)
{
if(!o->quiet_warnings) {
va_list ap;
va_start(ap, fmt);
fputs(WARN_PREFIX, stderr);
vfprintf(stderr, fmt, ap);
fputs("\n", stderr);
va_end(ap);
}
}
#define MAX_QPAIRS 1000
struct string qpairs[MAX_QPAIRS]; /* encoded */
struct string qpairsdec[MAX_QPAIRS]; /* decoded */
int nqpairs; /* how many is stored */
bool query_is_modified = false;
static void trurl_cleanup_options(struct option *o)
{
if(!o)
return;
curl_slist_free_all(o->url_list);
curl_slist_free_all(o->set_list);
curl_slist_free_all(o->iter_list);
curl_slist_free_all(o->append_query);
curl_slist_free_all(o->trim_list);
curl_slist_free_all(o->replace_list);
curl_slist_free_all(o->append_path);
}
static void errorf_low(const char *fmt, va_list ap)
{
message_low(ERROR_PREFIX, "\n"
ERROR_PREFIX "Try " PROGNAME " -h for help\n", fmt, ap);
}
static void errorf(struct option *o, int exit_code, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
errorf_low(fmt, ap);
va_end(ap);
trurl_cleanup_options(o);
curl_global_cleanup();
exit(exit_code);
}
static void verify(struct option *o, int exit_code, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if(!o->verify) {
warnf_low(fmt, ap);
va_end(ap);
}
else {
/* make sure to terminate the JSON array */
if(o->jsonout)
printf("%s]\n", o->urls ? "\n" : "");
errorf_low(fmt, ap);
va_end(ap);
trurl_cleanup_options(o);
curl_global_cleanup();
exit(exit_code);
}
}
static char *strurldecode(const char *url, int inlength, int *outlength)
{
return curl_easy_unescape(NULL, inlength ? url : "", inlength,
outlength);
}
static void urladd(struct option *o, const char *url)
{
struct curl_slist *n;
n = curl_slist_append(o->url_list, url);
if(n)
o->url_list = n;
}
/* read URLs from this file/stdin */
static void urlfile(struct option *o, const char *file)
{
FILE *f;
if(o->url)
errorf(o, ERROR_FLAG, "only one --url-file is supported");
if(strcmp("-", file)) {
f = fopen(file, "rt");
if(!f)
errorf(o, ERROR_FILE, "--url-file %s not found", file);
o->urlopen = true;
}
else
f = stdin;
o->url = f;
}
static void pathadd(struct option *o, const char *path)
{
struct curl_slist *n;
char *urle = curl_easy_escape(NULL, path, 0);
if(urle) {
n = curl_slist_append(o->append_path, urle);
if(n) {
o->append_path = n;
}
curl_free(urle);
}
}
static void queryadd(struct option *o, const char *query)
{
struct curl_slist *n;
char *p = strchr(query, '=');
char *urle;
if(p) {
/* URL encode the left and the right side of the '=' separately */
char *f1 = curl_easy_escape(NULL, query, (int)(p - query));
char *f2 = curl_easy_escape(NULL, p + 1, 0);
urle = curl_maprintf("%s=%s", f1, f2);
curl_free(f1);
curl_free(f2);
}
else
urle = curl_easy_escape(NULL, query, 0);
if(urle) {
n = curl_slist_append(o->append_query, urle);
if(n) {
o->append_query = n;
}
curl_free(urle);
}
}
static void appendadd(struct option *o,
const char *arg)
{
if(!strncmp("path=", arg, 5))
pathadd(o, arg + 5);
else if(!strncmp("query=", arg, 6))
queryadd(o, arg + 6);
else
errorf(o, ERROR_APPEND, "--append unsupported component: %s", arg);
}
static void setadd(struct option *o,
const char *set) /* [component]=[data] */
{
struct curl_slist *n;
n = curl_slist_append(o->set_list, set);
if(n)
o->set_list = n;
}
static void iteradd(struct option *o,
const char *iter) /* [component]=[data] */
{
struct curl_slist *n;
n = curl_slist_append(o->iter_list, iter);
if(n)
o->iter_list = n;
}
static void trimadd(struct option *o,
const char *trim) /* [component]=[data] */
{
struct curl_slist *n;
n = curl_slist_append(o->trim_list, trim);
if(n)
o->trim_list = n;
}
static void replaceadd(struct option *o,
const char *replace_list) /* [component]=[data] */
{
struct curl_slist *n = NULL;
if(replace_list)
n = curl_slist_append(o->replace_list, replace_list);
else
errorf(o, ERROR_REPL, "No data passed to replace component");
if(n)
o->replace_list = n;
}
static bool longarg(const char *flag, const char *check)
{
/* the given flag might end with an equals sign */
size_t len = strlen(flag);
return (!strcmp(flag, check) ||
(!strncmp(flag, check, len) && check[len] == '='));
}
static bool checkoptarg(struct option *o, const char *flag,
const char *given,
const char *arg)
{
bool shortopt = false;
if((flag[0] == '-') && (flag[1] != '-'))
shortopt = true;
if((!shortopt && longarg(flag, given)) ||
(!strncmp(flag, given, 2) && shortopt)) {
if(!arg)
errorf(o, ERROR_ARG, "Missing argument for %s", flag);
return true;
}
return false;
}
static int getarg(struct option *o,
const char *flag,
const char *arg,
bool *usedarg)
{
bool gap = true;
*usedarg = false;
if((flag[0] == '-') && (flag[1] != '-') && flag[2]) {
arg = (char *)&flag[2];
gap = false;
}
else if((flag[0] == '-') && (flag[1] == '-')) {
char *equals = strchr(&flag[2], '=');
if(equals) {
arg = (char *)&equals[1];
gap = false;
}
}
if(!strcmp("--", flag))
o->end_of_options = true;
else if(!strcmp("-v", flag) || !strcmp("--version", flag))
show_version();
else if(!strcmp("-h", flag) || !strcmp("--help", flag))
help();
else if(checkoptarg(o, "--url", flag, arg)) {
urladd(o, arg);
*usedarg = gap;
}
else if(checkoptarg(o, "-f", flag, arg) ||
checkoptarg(o, "--url-file", flag, arg)) {
urlfile(o, arg);
*usedarg = gap;
}
else if(checkoptarg(o, "-a", flag, arg) ||
checkoptarg(o, "--append", flag, arg)) {
appendadd(o, arg);
*usedarg = gap;
}
else if(checkoptarg(o, "-s", flag, arg) ||
checkoptarg(o, "--set", flag, arg)) {
setadd(o, arg);
*usedarg = gap;
}
else if(checkoptarg(o, "--iterate", flag, arg)) {
iteradd(o, arg);
*usedarg = gap;
}
else if(checkoptarg(o, "--redirect", flag, arg)) {
if(o->redirect)
errorf(o, ERROR_FLAG, "only one --redirect is supported");
o->redirect = arg;
*usedarg = gap;
}
else if(checkoptarg(o, "--query-separator", flag, arg)) {
if(o->qsep)
errorf(o, ERROR_FLAG, "only one --query-separator is supported");
if(strlen(arg) != 1)
errorf(o, ERROR_FLAG,
"only single-letter query separators are supported");
o->qsep = arg;
*usedarg = gap;
}
else if(checkoptarg(o, "--trim", flag, arg)) {
trimadd(o, arg);
*usedarg = gap;
}
else if(checkoptarg(o, "-g", flag, arg) ||
checkoptarg(o, "--get", flag, arg)) {
if(o->format)
errorf(o, ERROR_FLAG, "only one --get is supported");
if(o->jsonout)
errorf(o, ERROR_FLAG,
"--get is mutually exclusive with --json");
o->format = arg;
*usedarg = gap;
}
else if(!strcmp("--json", flag)) {
if(o->format)
errorf(o, ERROR_FLAG, "--json is mutually exclusive with --get");
o->jsonout = true;
}
else if(!strcmp("--verify", flag))
o->verify = true;
else if(!strcmp("--accept-space", flag)) {
#ifdef SUPPORTS_ALLOW_SPACE
o->accept_space = true;
#else
trurl_warnf(o,
"built with too old libcurl version, --accept-space does not work");
#endif
}
else if(!strcmp("--curl", flag))
o->curl = true;
else if(!strcmp("--default-port", flag))
o->default_port = true;
else if(!strcmp("--keep-port", flag))
o->keep_port = true;
else if(!strcmp("--punycode", flag)) {
if(o->puny2idn)
errorf(o, ERROR_FLAG, "--punycode is mutually exclusive with --as-idn");
o->punycode = true;
}
else if(!strcmp("--as-idn", flag)) {
if(o->punycode)
errorf(o, ERROR_FLAG, "--as-idn is mutually exclusive with --punycode");
o->puny2idn = true;
}
else if(!strcmp("--no-guess-scheme", flag))
o->no_guess_scheme = true;
else if(!strcmp("--sort-query", flag))
o->sort_query = true;
else if(!strcmp("--urlencode", flag))
o->urlencode = true;
else if(!strcmp("--quiet", flag))
o->quiet_warnings = true;
else if(!strcmp("--replace", flag)) {
replaceadd(o, arg);
*usedarg = gap;
}
else if(!strcmp("--force-replace", flag)) {
replaceadd(o, arg);
o->force_replace = true;
*usedarg = gap;
}
else
return 1; /* unrecognized option */
return 0;
}
static void showqkey(FILE *stream, const char *key, size_t klen,
bool urldecode, bool showall)
{
int i;
bool shown = false;
struct string *qp = urldecode ? qpairsdec : qpairs;
for(i = 0; i< nqpairs; i++) {
if(!strncmp(key, qp[i].str, klen) && (qp[i].str[klen] == '=')) {
if(shown)
fputc(' ', stream);
fprintf(stream, "%.*s", (int) (qp[i].len - klen - 1),
&qp[i].str[klen + 1]);
if(!showall)
break;
shown = true;
}
}
}
/* component to variable pointer */
static const struct var *comp2var(const char *name, size_t vlen)
{
int i;
for(i = 0; variables[i].name; i++)
if((strlen(variables[i].name) == vlen) &&
!strncmp(name, variables[i].name, vlen))
return &variables[i];
return NULL;
}
static CURLUcode geturlpart(struct option *o, int modifiers, CURLU *uh,
CURLUPart part, char **out)
{
CURLUcode rc = curl_url_get(uh, part, out,
(((modifiers & VARMODIFIER_DEFAULT) ||
o->default_port) ?
CURLU_DEFAULT_PORT :
((part != CURLUPART_URL || o->keep_port) ?
0 : CURLU_NO_DEFAULT_PORT))|
#ifdef SUPPORTS_PUNYCODE
(((modifiers & VARMODIFIER_PUNY) || o->punycode) ?
CURLU_PUNYCODE : 0)|
#endif
#ifdef SUPPORTS_PUNY2IDN
(((modifiers & VARMODIFIER_PUNY2IDN) || o->puny2idn) ?
CURLU_PUNY2IDN : 0) |
#endif
(o->curl ? 0 : CURLU_NON_SUPPORT_SCHEME)|
(((modifiers & VARMODIFIER_URLENCODED) ||
o->urlencode) ?
0 :CURLU_URLDECODE));
#ifdef SUPPORTS_PUNY2IDN
/* retry get w/ out puny2idn to handle invalid punycode conversions */
if(rc == CURLUE_BAD_HOSTNAME &&
(o->puny2idn || (modifiers & VARMODIFIER_PUNY2IDN))) {
curl_free(*out);
modifiers &= ~VARMODIFIER_PUNY2IDN;
o->puny2idn = false;
trurl_warnf(o,
"Error converting url to IDN [%s]",
curl_url_strerror(rc));
return geturlpart(o, modifiers, uh, part, out);
}
#endif
return rc;
}
static void showurl(FILE *stream, struct option *o, int modifiers,
CURLU *uh)
{
char *url;
CURLUcode rc = geturlpart(o, modifiers, uh, CURLUPART_URL, &url);
if(rc) {
trurl_cleanup_options(o);
verify(o, ERROR_BADURL, "invalid url [%s]", curl_url_strerror(rc));
return;
}
fputs(url, stream);
curl_free(url);
}
static void get(struct option *o, CURLU *uh)
{
FILE *stream = stdout;
const char *ptr = o->format;
bool done = false;
char startbyte = 0;
char endbyte = 0;
while(ptr && *ptr && !done) {
if(!startbyte && (('{' == *ptr) || ('[' == *ptr))) {
startbyte = *ptr;
if('{' == *ptr)
endbyte = '}';
else
endbyte = ']';
}
if(startbyte == *ptr) {
if(startbyte == ptr[1]) {
/* an escaped {-letter */
fputc(startbyte, stream);
ptr += 2;
}
else {
/* this is meant as a variable to output */
const char *start = ptr;
char *end;
char *cl;
size_t vlen;
bool isquery = false;
bool queryall = false;
bool strict = false; /* strict mode, fail on URL decode problems */
int mods = 0;
end = strchr(ptr, endbyte);
ptr++; /* pass the { */
if(!end) {
/* syntax error */
fputc(startbyte, stream);
continue;
}
/* {path} {:path} {/path} */
if(*ptr == ':') {
mods |= VARMODIFIER_URLENCODED;
ptr++;
}
vlen = end - ptr;
do {
size_t wordlen;
cl = memchr(ptr, ':', vlen);
if(!cl)
break;
wordlen = cl - ptr + 1;
/* modifiers! */
if(!strncmp(ptr, "default:", wordlen))
mods |= VARMODIFIER_DEFAULT;
else if(!strncmp(ptr, "puny:", wordlen)) {
if(mods & VARMODIFIER_PUNY2IDN)
errorf(o, ERROR_GET,
"puny modifier is mutually exclusive with idn");
mods |= VARMODIFIER_PUNY;
}
else if(!strncmp(ptr, "idn:", wordlen)) {
if(mods & VARMODIFIER_PUNY)
errorf(o, ERROR_GET,
"idn modifier is mutually exclusive with puny");
mods |= VARMODIFIER_PUNY2IDN;
}
else if(!strncmp(ptr, "strict:", wordlen))
strict = true;
else if(!strncmp(ptr, "url:", wordlen))
mods |= VARMODIFIER_URLENCODED;
else {
if(!strncmp(ptr, "query-all:", wordlen)) {
isquery = true;
queryall = true;
}
else if(!strncmp(ptr, "query:", wordlen))
isquery = true;
else {
/* syntax error */
vlen = 0;
end[1] = '\0';
}
break;
}
ptr = cl + 1;
vlen = end - ptr;
} while(true);
if(isquery) {
showqkey(stream, cl + 1, end - cl - 1,
!o->urlencode && !(mods & VARMODIFIER_URLENCODED),
queryall);
}
else if(!vlen)
errorf(o, ERROR_GET, "Bad --get syntax: %s", start);
else if(!strncmp(ptr, "url", vlen))
showurl(stream, o, mods, uh);
else {
const struct var *v = comp2var(ptr, vlen);
if(v) {
char *nurl;
CURLUcode rc = geturlpart(o, mods, uh, v->part, &nurl);
switch(rc) {
case CURLUE_OK:
fputs(nurl, stream);
curl_free(nurl);
case CURLUE_NO_SCHEME:
case CURLUE_NO_USER:
case CURLUE_NO_PASSWORD:
case CURLUE_NO_OPTIONS:
case CURLUE_NO_HOST:
case CURLUE_NO_PORT:
case CURLUE_NO_QUERY:
case CURLUE_NO_FRAGMENT:
#ifdef SUPPORTS_ZONEID
case CURLUE_NO_ZONEID:
#endif
/* silently ignore */
break;
default:
if((rc == CURLUE_URLDECODE) && strict)
errorf(o, ERROR_GET, "problems URL decoding %s", v->name);
else
trurl_warnf(o, "%s (%s)", curl_url_strerror(rc), v->name);
break;
}
}
else
errorf(o, ERROR_GET, "\"%.*s\" is not a recognized URL component",
(int)vlen, ptr);
}
ptr = end + 1; /* pass the end */
}
}
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;
case '\\':
fputc('\\', stream);
break;
case '{':
fputc('{', stream);
break;
case '[':
fputc('[', stream);
break;
default:
/* unknown, just output this */
fputc(*ptr, stream);
fputc(ptr[1], stream);
break;
}
ptr += 2;
}
else {
fputc(*ptr, stream);
ptr++;
}
}
fputc('\n', stream);
}
static const struct var *setone(CURLU *uh, const char *setline,
struct option *o)
{
char *ptr = strchr(setline, '=');
const struct var *v = NULL;
if(ptr && (ptr > setline)) {
size_t vlen = ptr - setline;
bool urlencode = true;
bool conditional = false;
bool found = false;
if(vlen) {
int back = -1;
size_t reqlen = 1;
while(vlen > reqlen) {
if(ptr[back] == ':') {
urlencode = false;
vlen--;
}
else if(ptr[back] == '?') {
conditional = true;
vlen--;
}
else
break;
reqlen++;
back--;
}
}
v = comp2var(setline, vlen);
if(v) {
CURLUcode rc = CURLUE_OK;
bool skip = false;
if((v->part == CURLUPART_HOST) && ('[' == ptr[1]))
/* when setting an IPv6 numerical address, disable URL encoding */
urlencode = false;
if(conditional) {
char *piece;
rc = curl_url_get(uh, v->part, &piece, CURLU_NO_GUESS_SCHEME);
if(!rc) {
skip = true;
curl_free(piece);
}
}
if(!skip)