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92e6782d1f
Some public prototypes do not declare return values or out parameters as const where they should be. Avoid changing the public interface, but document those values as read-only. Closes #19692
73 lines
1.5 KiB
Markdown
73 lines
1.5 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: curl_unescape
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Section: 3
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Source: libcurl
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See-also:
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- RFC 2396
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- curl_easy_escape (3)
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- curl_easy_unescape (3)
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- curl_free (3)
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Protocol:
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- All
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Added-in: 7.1
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---
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# NAME
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curl_unescape - URL decode a string
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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char *curl_unescape(const char *input, int length);
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~~~
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# DESCRIPTION
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Deprecated. Use curl_easy_unescape(3) instead.
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This function converts the URL encoded string **input** to a "plain string"
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and return that as a new allocated string. All input characters that are URL
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encoded (%XX where XX is a two-digit hexadecimal number) are converted to
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their plain text versions. Although not constrained by its type, the returned
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data may not be altered.
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If the **length** argument is set to 0, curl_unescape(3) calls
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strlen() on **input** to find out the size.
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You must curl_free(3) the returned string when you are done with it.
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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char *decoded = curl_unescape("%63%75%72%6c", 12);
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if(decoded) {
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/* do not assume printf() works on the decoded data */
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printf("Decoded: ");
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/* ... */
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curl_free(decoded);
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}
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}
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}
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~~~
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# DEPRECATED
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Since 7.15.4, curl_easy_unescape(3) should be used. This function might
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be removed in a future release.
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# %AVAILABILITY%
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# RETURN VALUE
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A pointer to a null-terminated string or NULL if it failed.
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