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authorDaniel Stenberg <daniel@haxx.se>2005-02-02 19:25:37 +0000
committerDaniel Stenberg <daniel@haxx.se>2005-02-02 19:25:37 +0000
commit6b81cf4bc9e0fa65bfef06f8dff8ad292b2fcb47 (patch)
tree28b32b5a398530f61d697045d3957a1b493648c2 /docs/examples
parent0d9301539e5ec58371c93f8e5f5346a5a4f5f43c (diff)
HTML parsing example with libtidy, by Jeff Pohlmeyer
Diffstat (limited to 'docs/examples')
-rw-r--r--docs/examples/htmltidy.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/docs/examples/htmltidy.c b/docs/examples/htmltidy.c
new file mode 100644
index 000000000..112a4e6b6
--- /dev/null
+++ b/docs/examples/htmltidy.c
@@ -0,0 +1,118 @@
+/*****************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * $Id$
+ *
+ * Download a document and use libtidy to parse the HTML.
+ * Written by Jeff Pohlmeyer
+ *
+ * LibTidy => http://tidy.sourceforge.net
+ *
+ * gcc -Wall -I/usr/local/include tidycurl.c -lcurl -ltidy -o tidycurl
+ *
+ */
+
+#include <stdio.h>
+#include <tidy/tidy.h>
+#include <tidy/buffio.h>
+#include <curl/curl.h>
+
+/* curl write callback, to fill tidy's input buffer... */
+uint write_cb(char *in, uint size, uint nmemb, TidyBuffer *out)
+{
+ uint r;
+ r = size * nmemb;
+ tidyBufAppend( out, in, r );
+ return(r);
+}
+
+/* Traverse the document tree */
+void dumpNode(TidyDoc doc, TidyNode tnod, int indent )
+{
+ TidyNode child;
+ for ( child = tidyGetChild(tnod); child; child = tidyGetNext(child) )
+ {
+ ctmbstr name = tidyNodeGetName( child );
+ if ( name )
+ {
+ /* if it has a name, then it's an HTML tag ... */
+ TidyAttr attr;
+ printf( "%*.*s%s ", indent, indent, "<", name);
+ /* walk the attribute list */
+ for ( attr=tidyAttrFirst(child); attr; attr=tidyAttrNext(attr) ) {
+ printf(tidyAttrName(attr));
+ tidyAttrValue(attr)?printf("=\"%s\" ",
+ tidyAttrValue(attr)):printf(" ");
+ }
+ printf( ">\n");
+ }
+ else {
+ /* if it doesn't have a name, then it's probably text, cdata, etc... */
+ TidyBuffer buf;
+ tidyBufInit(&buf);
+ tidyNodeGetText(doc, child, &buf);
+ printf("%*.*s\n", indent, indent, buf.bp?(char *)buf.bp:"");
+ tidyBufFree(&buf);
+ }
+ dumpNode( doc, child, indent + 4 ); /* recursive */
+ }
+}
+
+
+int main(int argc, char **argv )
+{
+ CURL *curl;
+ char curl_errbuf[CURL_ERROR_SIZE];
+ TidyDoc tdoc;
+ TidyBuffer docbuf = {0};
+ TidyBuffer tidy_errbuf = {0};
+ int err;
+ if ( argc == 2) {
+ curl = curl_easy_init();
+ curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
+ curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errbuf);
+ curl_easy_setopt(curl, CURLOPT_NOPROGRESS, no);
+ curl_easy_setopt(curl, CURLOPT_VERBOSE, yes);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
+
+ tdoc = tidyCreate();
+ tidyOptSetBool(tdoc, TidyForceOutput, yes); /* try harder */
+ tidyOptSetInt(tdoc, TidyWrapLen, 4096);
+ tidySetErrorBuffer( tdoc, &tidy_errbuf );
+ tidyBufInit(&docbuf);
+
+ curl_easy_setopt(curl, CURLOPT_WRITEDATA, &docbuf);
+ err=curl_easy_perform(curl);
+ if ( !err ) {
+ err = tidyParseBuffer(tdoc, &docbuf); /* parse the input */
+ if ( err >= 0 ) {
+ err = tidyCleanAndRepair(tdoc); /* fix any problems */
+ if ( err >= 0 ) {
+ err = tidyRunDiagnostics(tdoc); /* load tidy error buffer */
+ if ( err >= 0 ) {
+ dumpNode( tdoc, tidyGetRoot(tdoc), 0 ); /* walk the tree */
+ fprintf(stderr, "%s\n", tidy_errbuf.bp); /* show errors */
+ }
+ }
+ }
+ }
+ else
+ fprintf(stderr, "%s\n", curl_errbuf);
+
+ /* clean-up */
+ curl_easy_cleanup(curl);
+ tidyBufFree(&docbuf);
+ tidyBufFree(&tidy_errbuf);
+ tidyRelease(tdoc);
+ return(err);
+
+ }
+ else
+ printf( "usage: %s <url>\n", argv[0] );
+
+ return(0);
+}