370367fcd5
minnnjuuu
2026-09-21
Subject
examples: clean up crawler link parsing resources
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docs/examples/crawler.c+17 -4
| @@ -136,13 +136,20 @@ static size_t follow_links(CURLM *multi, struct memory *mem, const char *url) | |
| return 0; | |
| xpath = (xmlChar *)"//a/@href"; | |
| context = xmlXPathNewContext(doc); | |
| + | if(!context) { |
| + | xmlFreeDoc(doc); |
| + | return 0; |
| + | } |
| object = xmlXPathEvalExpression(xpath, context); | |
| xmlXPathFreeContext(context); | |
| - | if(!object) |
| + | if(!object) { |
| + | xmlFreeDoc(doc); |
| return 0; | |
| + | } |
| nodeset = object->nodesetval; | |
| if(xmlXPathNodeSetIsEmpty(nodeset)) { | |
| xmlXPathFreeObject(object); | |
| + | xmlFreeDoc(doc); |
| return 0; | |
| } | |
| count = 0; | |
| @@ -158,16 +165,22 @@ static size_t follow_links(CURLM *multi, struct memory *mem, const char *url) | |
| xmlFree(orig); | |
| } | |
| link = (char *)href; | |
| - | if(!link || strlen(link) < 20) |
| + | if(!link || strlen(link) < 20) { |
| + | xmlFree(link); |
| continue; | |
| + | } |
| if(!strncmp(link, "http://", 7) || !strncmp(link, "https://", 8)) { | |
| - | curl_multi_add_handle(multi, make_handle(link)); |
| - | if(count++ == max_link_per_page) |
| + | if(count >= max_link_per_page) { |
| + | xmlFree(link); |
| break; | |
| + | } |
| + | curl_multi_add_handle(multi, make_handle(link)); |
| + | count++; |
| } | |
| xmlFree(link); | |
| } | |
| xmlXPathFreeObject(object); | |
| + | xmlFreeDoc(doc); |
| return count; | |
| } | |