C Linux HTML條不工作

Question

我的代碼如下所示，輸入用戶輸入的URL並打印頁面的HTML代碼內容。代碼的（）循環的第一個是爲了去掉HTML中的< ...>之間的代碼，但我似乎無法讓它工作，它不會打印任何東西。

任何人都可以看到，如果我的代碼有問題，它工作正常，但不會刪除或打印任何東西后上述for（）循環。

#include <curl/curl.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <fcntl.h> 
#include <unistd.h> 
#include <curl/curl.h> 
#include <curl/types.h> 
#include <curl/easy.h> 
#include <string.h> 

/* 
* 
*/ 

size_t write_data(void *ptr, size_t size, size_t nmeb, void *stream) { 
    return fwrite(ptr, size, nmeb, stream); 
} 

/* function prototypes to define later */ 
char *do_web_request(char *url); 
size_t static write_callback_func(void *buffer, 
     size_t size, 
     size_t nmemb, 
     void *userp); 

int main(int argc, char** argv) { 

    char str[100]; 
    int len; 
    printf("Enter the website URL:\n"); 
    scanf("%s", str); 
    char *content = NULL; 

    content = do_web_request(str); 

    len = strlen(str); 

    int i; 
    int idx = 0; 
    int opened = 0; 

    printf("Original content::"); 
    printf("%s", content); 

    printf("\nReplaced String "); 

    for (i = 0; i < len; i++) { 
     if (content[i] == '<') { 
      opened = 1; 
     } else if (content[i] == '>') { 
      opened = 0; 
     } else if (!opened) { 
      content[idx++] = content[i]; 
     } 
    } 

    content[idx] = '\0'; 
    printf("%s\n", content); 

    return (EXIT_SUCCESS); 
} 

/* the function to return the content for a url */ 
char *do_web_request(char *str) { 
    /* keeps the handle to the curl object */ 
    CURL *curl_handle = NULL; 
    /* to keep the response */ 
    char *response = NULL; 

    /* initializing curl and setting the url */ 
    curl_handle = curl_easy_init(); 
    curl_easy_setopt(curl_handle, CURLOPT_URL, str); 
    curl_easy_setopt(curl_handle, CURLOPT_HTTPGET, 1); 

    /* follow locations specified by the response header */ 
    curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1); 

    /* setting a callback function to return the data */ 
    curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_callback_func); 

    /* passing the pointer to the response as the callback parameter */ 
    curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, &response); 

    /* perform the request */ 
    curl_easy_perform(curl_handle); 

    /* cleaning all curl stuff */ 
    curl_easy_cleanup(curl_handle); 

    return response; 
} 

/* the function to invoke as the data recieved */ 
size_t static write_callback_func(void *buffer, 
     size_t size, 
     size_t nmemb, 
     void *userp) { 
    char **response_ptr = (char**) userp; 

    /* assuming the response is a string */ 
    *response_ptr = strndup(buffer, (size_t) (size * nmemb)); 

} 

Answer 1

我想這：

len = strlen(str); 

應該是：

len = strlen(content); 

否則，你將不能正確檢查返回HTML作爲len將是URL的len由用戶輸入。