C curl/curl.h錯誤

Question

我想使用curl/curl.h來清理URL輸入，但是當我編譯時出現以下錯誤：「error：expected declaration specifiers or'...' 'X」。它被綁定到代碼行：「char * curl_easy_escape（CURL * curl，char * Buffer，x）;」但我不確定問題是什麼。

#include <stdio.h> 
#include <string.h> 
#include <stddef.h> 
#include <stdlib.h> 
#include <openssl/md5.h> 
#include <curl/curl.h> 

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

printf("Content-type: text/html\n\n"); 

char *qPtr; 
FILE *fPtr; 
unsigned char digest[MD5_DIGEST_LENGTH]; 
int i; 
char mdString[33]; 
int x = 0; 

if(qPtr = getenv("QUERY_STRING")) { 
char Buffer[256]; 
char *Token; 
char username[80], password[80], email[80]; 
strncpy(Buffer, qPtr, 255); //copy Env variable "QUERY_STRING" into qPtr pointer 

//clean up URL 
char *curl_easy_escape(CURL * curl, char *Buffer, x); 


Token = strtok(Buffer, "&"); //get first query 
sscanf(Token, "username=%s", username); //gets value of username field input 

Token = strtok(NULL, "&"); //get second query 
sscanf(Token, "password=%s", password); //gets value of password field input 

//Execute MD5 library on password string 
MD5((unsigned char *)&password, strlen(password), (unsigned char*)&digest); 

for(i = 0; i < 16; i++) { 
    sprintf(&mdString[i*2], "%02x", (unsigned int)digest[i]); 
} //end MD5 


Token = strtok(NULL, "&"); //get third query 
sscanf(Token, "email=%s", email); //gets value of email field input 

//write username, password and email to file 
fPtr = fopen("users.txt", "a+"); 
fprintf(fPtr, "%s=", username); 
fprintf(fPtr, "%s=", mdString); 
fprintf(fPtr, "%s\n", email); 
fclose(fPtr); 

} else { printf("<p>Error: did not get a QUERY_STRING variable."); } 

} 

Answer 1

嘗試改變：

char *curl_easy_escape(CURL *curl, char *Buffer, x); 

有：

CURL *curl = curl_easy_init(); 
char *escapedBuffer = curl_easy_escape(curl, Buffer, x); 

和麪具說，你的主要功能應該返回一個int。

你應該閱讀：

http://curl.haxx.se/libcurl/c/curl_easy_escape.html

Answer 2

從裏面的函數中刪除這個函數原型。這是無效的C代碼。

char *curl_easy_escape(CURL * curl, char *Buffer, x); 

順便說一句，你的主要功能應該返回int。