405 cURL FTP错误

Question

我想通过cURL通过FTP上传文件，并收到405方法不允许。我效仿了the documentation这个例子，但到目前为止还没有运气。该示例的唯一补充是curl_easy_setopt(curl, CURLOPT_USERPWD, "*******:*******")和ftp地址。我花了大部分时间来弄清楚正确的ftp URL格式，而现在的错误是我认为是正确的。

注：使用#define REMOTE_URL "ftp://*********.com/home/*********/public_html/data/"，卷曲返回与http://URL using bad/illegal format or missing URL

#include <stdio.h> 
#include <string.h> 

#include <curl/curl.h> 
#include <sys/types.h> 
#include <sys/stat.h> 
#include <fcntl.h> 
#include <errno.h> 
#ifdef WIN32 
#include <io.h> 
#else 
#include <unistd.h> 
#endif 

/* <DESC> 
* Performs an FTP upload and renames the file just after a successful 
* transfer. 
* </DESC> 
*/ 

#define LOCAL_FILE  "data.csv" 
#define UPLOAD_FILE_AS "ftpd.csv" 
#define REMOTE_URL  "http://*********.com/home/*********/public_html/data/" 
#define RENAME_FILE_TO "renamed-and-fine.txt" 

/* NOTE: if you want this example to work on Windows with libcurl as a 
DLL, you MUST also provide a read callback with CURLOPT_READFUNCTION. 
Failing to do so will give you a crash since a DLL may not use the 
variable's memory when passed in to it from an app like this. */ 
static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream) 
{ 
    curl_off_t nread; 
    /* in real-world cases, this would probably get this data differently 
    as this fread() stuff is exactly what the library already would do 
    by default internally */ 
    size_t retcode = fread(ptr, size, nmemb, (FILE*) stream); 

    nread = (curl_off_t)retcode; 

    fprintf(stderr, "*** We read %" CURL_FORMAT_CURL_OFF_T 
      " bytes from file\n", nread); 
    return retcode; 
} 

int main(void) 
{ 
    CURL *curl; 
    CURLcode res; 
    FILE *hd_src; 
    struct stat file_info; 
    curl_off_t fsize; 

    struct curl_slist *headerlist=NULL; 
    static const char buf_1 [] = "RNFR " UPLOAD_FILE_AS; 
    static const char buf_2 [] = "RNTO " RENAME_FILE_TO; 

    /* get the file size of the local file */ 
    if(stat(LOCAL_FILE, &file_info)) { 
     printf("Couldnt open '%s': %s\n", LOCAL_FILE, strerror(errno)); 
     return 1; 
    } 
    fsize = (curl_off_t)file_info.st_size; 

    printf("Local file size: %" CURL_FORMAT_CURL_OFF_T " bytes.\n", fsize); 

    /* get a FILE * of the same file */ 
    hd_src = fopen(LOCAL_FILE, "rb"); 

    /* In windows, this will init the winsock stuff */ 
    curl_global_init(CURL_GLOBAL_ALL); 

    /* get a curl handle */ 
    curl = curl_easy_init(); 
    if(curl) { 
     /* build a list of commands to pass to libcurl */ 
     headerlist = curl_slist_append(headerlist, buf_1); 
     headerlist = curl_slist_append(headerlist, buf_2); 

     /* we want to use our own read function */ 
     curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback); 

     /* enable uploading */ 
     curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L); 

     /* specify target */ 
     curl_easy_setopt(curl,CURLOPT_URL, REMOTE_URL); 

     /* username and password */ 
     curl_easy_setopt(curl, CURLOPT_USERPWD, "*******:*******"); 

     /* pass in that last of FTP commands to run after the transfer */ 
     curl_easy_setopt(curl, CURLOPT_POSTQUOTE, headerlist); 

     /* now specify which file to upload */ 
     curl_easy_setopt(curl, CURLOPT_READDATA, hd_src); 

     /* Set the size of the file to upload (optional). If you give a *_LARGE 
     option you MUST make sure that the type of the passed-in argument is a 
     curl_off_t. If you use CURLOPT_INFILESIZE (without _LARGE) you must 
     make sure that to pass in a type 'long' argument. */ 
     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, 
         (curl_off_t)fsize); 

     /* Now run off and do what you've been told! */ 
     res = curl_easy_perform(curl); 
     /* Check for errors */ 
     if(res != CURLE_OK) 
      fprintf(stderr, "curl_easy_perform() failed: %s\n", 
        curl_easy_strerror(res)); 

     /* clean up the FTP commands list */ 
     curl_slist_free_all (headerlist); 

     /* always cleanup */ 
     curl_easy_cleanup(curl); 
    } 
    fclose(hd_src); /* close the local file */ 

    curl_global_cleanup(); 
    return 0; 
} 

Answer 1

你REMOTE_URL开始。因此，curl连接到80端口的http服务器，并尝试发送非http命令。 FTP在不同的端口（21）有不同的服务，并且需要使用ftp://架构来使curl正确连接。