curl_easy_unescape - Online Linux Manual PageSection : 3
Updated : December 06, 2021
Source : libcurl 7.82.0
Note : libcurl Manual

NAMEcurl_easy_unescape - URL decodes the given string

SYNOPSIS#include <curl/curl.h> char *curl_easy_unescape(CURL *curl, const char *url, int inlength, int *outlength);

DESCRIPTIONThis function converts the given URL encoded input string to a "plain string" and returns that in an allocated memory area. All input characters that are URL encoded (%XX where XX is a two-digit hexadecimal number) are converted to their binary versions. If the length argument is set to 0 (zero), curl_easy_unescape(3) will use strlen() on the input url string to find out the size. If outlength is non-NULL, the function will write the length of the returned string in the integer it points to. This allows an escaped string containing %00 to still get used properly after unescaping. Since this is a pointer to an int type, it can only return a value up to INT_MAX so no longer string can be unescaped if the string length is returned in this parameter. You must curl_free(3) the returned string when you are done with it.

EXAMPLECURL *curl = curl_easy_init(); if(curl) { int decodelen; char *decoded = curl_easy_unescape(curl, "%63%75%72%6c", 12, &decodelen); if(decoded) { /* do not assume printf() works on the decoded data! */ printf("Decoded: "); /* ... */ curl_free(decoded); } curl_easy_cleanup(curl); }

AVAILABILITYAdded in 7.15.4 and replaces the old curl_unescape(3) function.

RETURN VALUEA pointer to a null-terminated string or NULL if it failed.

SEE ALSOcurl_easy_escape(3), curl_free (3),"RFC3986
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