128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/* <DESC>
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* Download a document and use libtidy to parse the HTML.
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* </DESC>
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*/
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/*
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* LibTidy => https://www.html-tidy.org/
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*/
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#include <stdio.h>
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#include <tidy.h>
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#include <tidybuffio.h>
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#include <curl/curl.h>
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/* curl write callback, to fill tidy's input buffer... */
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uint write_cb(char *in, uint size, uint nmemb, TidyBuffer *out)
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{
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uint r;
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r = size * nmemb;
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tidyBufAppend(out, in, r);
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return r;
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}
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/* Traverse the document tree */
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void dumpNode(TidyDoc doc, TidyNode tnod, int indent)
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{
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TidyNode child;
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for(child = tidyGetChild(tnod); child; child = tidyGetNext(child) ) {
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ctmbstr name = tidyNodeGetName(child);
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if(name) {
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/* if it has a name, then it's an HTML tag ... */
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TidyAttr attr;
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printf("%*.*s%s ", indent, indent, "<", name);
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/* walk the attribute list */
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for(attr = tidyAttrFirst(child); attr; attr = tidyAttrNext(attr) ) {
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printf(tidyAttrName(attr));
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tidyAttrValue(attr)?printf("=\"%s\" ",
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tidyAttrValue(attr)):printf(" ");
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}
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printf(">\n");
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}
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else {
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/* if it doesn't have a name, then it's probably text, cdata, etc... */
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TidyBuffer buf;
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tidyBufInit(&buf);
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tidyNodeGetText(doc, child, &buf);
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printf("%*.*s\n", indent, indent, buf.bp?(char *)buf.bp:"");
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tidyBufFree(&buf);
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}
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dumpNode(doc, child, indent + 4); /* recursive */
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}
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}
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int main(int argc, char **argv)
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{
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CURL *curl;
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char curl_errbuf[CURL_ERROR_SIZE];
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TidyDoc tdoc;
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TidyBuffer docbuf = {0};
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TidyBuffer tidy_errbuf = {0};
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int err;
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if(argc == 2) {
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curl = curl_easy_init();
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curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
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curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errbuf);
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curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
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tdoc = tidyCreate();
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tidyOptSetBool(tdoc, TidyForceOutput, yes); /* try harder */
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tidyOptSetInt(tdoc, TidyWrapLen, 4096);
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tidySetErrorBuffer(tdoc, &tidy_errbuf);
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tidyBufInit(&docbuf);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, &docbuf);
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err = curl_easy_perform(curl);
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if(!err) {
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err = tidyParseBuffer(tdoc, &docbuf); /* parse the input */
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if(err >= 0) {
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err = tidyCleanAndRepair(tdoc); /* fix any problems */
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if(err >= 0) {
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err = tidyRunDiagnostics(tdoc); /* load tidy error buffer */
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if(err >= 0) {
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dumpNode(tdoc, tidyGetRoot(tdoc), 0); /* walk the tree */
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fprintf(stderr, "%s\n", tidy_errbuf.bp); /* show errors */
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}
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}
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}
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}
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else
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fprintf(stderr, "%s\n", curl_errbuf);
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/* clean-up */
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curl_easy_cleanup(curl);
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tidyBufFree(&docbuf);
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tidyBufFree(&tidy_errbuf);
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tidyRelease(tdoc);
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return err;
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}
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else
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printf("usage: %s <url>\n", argv[0]);
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return 0;
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}
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