117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2019-2020 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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TALER is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public
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License along with TALER; see the file COPYING. If not, see
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<http://www.gnu.org/licenses/>
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*/
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/**
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* @file curl/curl.c
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* @brief Helper routines for interactions with libcurl
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include "taler_curl_lib.h"
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#if TALER_CURL_COMPRESS_BODIES
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#include <zlib.h>
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#endif
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/**
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* Add the @a body as POST data to the easy handle in @a ctx.
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*
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* @param[in,out] ctx a request context (updated)
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* @param eh easy handle to use
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* @param body JSON body to add to @e ctx
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* @return #GNUNET_OK on success #GNUNET_SYSERR on failure
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*/
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enum GNUNET_GenericReturnValue
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TALER_curl_easy_post (struct TALER_CURL_PostContext *ctx,
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CURL *eh,
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const json_t *body)
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{
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char *str;
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size_t slen;
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str = json_dumps (body,
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JSON_COMPACT);
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if (NULL == str)
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{
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GNUNET_break (0);
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return GNUNET_SYSERR;
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}
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slen = strlen (str);
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#if TALER_CURL_COMPRESS_BODIES
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{
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Bytef *cbuf;
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uLongf cbuf_size;
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int ret;
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cbuf_size = compressBound (slen);
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cbuf = GNUNET_malloc (cbuf_size);
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ret = compress (cbuf,
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&cbuf_size,
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(const Bytef *) str,
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slen);
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if (Z_OK != ret)
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{
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/* compression failed!? */
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GNUNET_break (0);
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GNUNET_free (cbuf);
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return GNUNET_SYSERR;
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}
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free (str);
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slen = (size_t) cbuf_size;
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ctx->json_enc = (char *) cbuf;
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}
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GNUNET_assert
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(NULL != (ctx->headers = curl_slist_append
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(ctx->headers,
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"Content-Encoding: deflate")));
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#else
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ctx->json_enc = str;
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#endif
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GNUNET_assert
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(NULL != (ctx->headers = curl_slist_append
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(ctx->headers,
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"Content-Type: application/json")));
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_POSTFIELDS,
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ctx->json_enc));
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_POSTFIELDSIZE,
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slen));
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return GNUNET_OK;
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}
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/**
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* Free the data in @a ctx.
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*
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* @param[in] ctx a request context (updated)
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*/
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void
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TALER_curl_easy_post_finished (struct TALER_CURL_PostContext *ctx)
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{
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curl_slist_free_all (ctx->headers);
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ctx->headers = NULL;
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GNUNET_free (ctx->json_enc);
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ctx->json_enc = NULL;
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}
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