mirror of
https://gitlab.com/gnuwget/wget2.git
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97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
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* Copyright (c) 2016-2024 Free Software Foundation, Inc.
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*
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* This file is part of libwget.
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*
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* Libwget is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Libwget is distributed in the hope that it will be useful,
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* but 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libwget. If not, see <https://www.gnu.org/licenses/>.
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*
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*
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* Demo how to create a diagram from a text using www.websequencediagrams.com.
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* Using high-level API.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wget.h>
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int main(int argc WGET_GCC_UNUSED, const char *const *argv WGET_GCC_UNUSED)
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{
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wget_http_connection *conn = NULL;
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wget_http_response *resp;
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// set up libwget global configuration
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wget_global_init(
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// WGET_DEBUG_STREAM, stderr,
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WGET_ERROR_STREAM, stderr,
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WGET_INFO_STREAM, stdout,
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0);
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// This is the text that we want to convert into a GFX
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const char *text = "alice->bob: authentication request\nbob-->alice: response";
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const char *style = "qsd";
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wget_buffer *url = wget_buffer_alloc(128);
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wget_buffer *body = wget_buffer_alloc(128);
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wget_buffer_strcpy(body, "message=");
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wget_iri_escape_query(text, body);
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wget_buffer_printf_append(body, "&style=%s&apiVersion=1", style);
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resp = wget_http_get(
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WGET_HTTP_URL, "https://www.websequencediagrams.com",
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WGET_HTTP_SCHEME, "POST",
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WGET_HTTP_HEADER_ADD, "Content-Type", "application/x-www-form-urlencoded",
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WGET_HTTP_BODY, body->data, body->length,
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WGET_HTTP_CONNECTION_PTR, &conn,
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0);
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if (resp) {
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// wget_info_printf("answer=%s\n", resp->body->data);
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// extract image URL using a hack. Using a JSON parser would be correct.
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const char *p, *e;
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if (!(p = strstr(resp->body->data, "\"img\": \"")))
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goto out;
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if (!(e = strchr(p + 8, '\"')))
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goto out;
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p += 8;
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wget_buffer_printf(url, "https://www.websequencediagrams.com/%.*s", (int) (e - p), p);
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// free the response
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wget_http_free_response(&resp);
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resp = wget_http_get(
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WGET_HTTP_URL, url->data,
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WGET_HTTP_BODY_SAVEAS, "out.png",
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0);
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if (resp)
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wget_info_printf("Saved out.png\n");
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}
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out:
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wget_http_free_response(&resp);
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wget_http_close(&conn);
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wget_buffer_free(&body);
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wget_buffer_free(&url);
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// free resources - needed for valgrind testing
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wget_global_deinit();
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return 0;
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}
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