[Global]: loading init

deps/curl/docs/examples/htmltidy.c

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+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 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.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+/* <DESC>
+ * Download a document and use libtidy to parse the HTML.
+ * </DESC>
+ */
+/*
+ * LibTidy => https://www.html-tidy.org/
+ */
+
+#include <stdio.h>
+#include <tidy/tidy.h>
+#include <tidy/tidybuffio.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("%s", tidyAttrName(attr));
+        tidyAttrValue(attr)?printf("=\"%s\" ",
+                                   tidyAttrValue(attr)):printf(" ");
+      }
+      printf(">\n");
+    }
+    else {
+      /* if it does not 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)
+{
+  if(argc == 2) {
+    CURL *curl;
+    char curl_errbuf[CURL_ERROR_SIZE];
+    TidyDoc tdoc;
+    TidyBuffer docbuf = {0};
+    TidyBuffer tidy_errbuf = {0};
+    int err;
+
+    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, 0L);
+    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+    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;
+}