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.\" **************************************************************************
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.\" * Copyright (C) 1998 - 2016, 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.
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.\"
.TH curl_easy_unescape 3 "7 April 2006" "libcurl 7.15.4" "libcurl Manual"
.SH NAME
curl_easy_unescape - URL decodes the given string
.SH SYNOPSIS
.B #include <curl/curl.h>
.sp
.BI "char *curl_easy_unescape( CURL *" curl ", const char *" url
.BI ", int "inlength ", int *" outlength " );"
.ad
.SH DESCRIPTION
This 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 \fBlength\fP argument is set to 0 (zero), \fIcurl_easy_unescape(3)\fP
will use strlen() on the input \fIurl\fP string to find out the size.
If \fBoutlength\fP 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 \fIint\fP 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 \fIcurl_free(3)\fP the returned string when you're done with it.
.SH AVAILABILITY
Added in 7.15.4 and replaces the old \fIcurl_unescape(3)\fP function.
.SH RETURN VALUE
A pointer to a zero terminated string or NULL if it failed.
.SH "SEE ALSO"
.BR curl_easy_escape "(3), " curl_free "(3)," RFC 3986