IOS上通过CURL的FTP上传下载，

   前些天看了下IOS苹果关于FTP上传下载的官方例子，说实话，真心不好用，各种问题，所以用CURL自己写了个上传下载的小demo

只需填入相关的参数即可完成下载，如果想要添加其他功能也可以在库中找找其它对应参数写进去。

关于CURL的苹果用的库可以在这里下载http://curl.haxx.se/download.html，

将security和libz两个库也要倒入到工程，再将targets里面的searchPaths改为YES并填入正确的.h文件地址就可以了

上传

#import <Foundation/Foundation.h>

#include "curl/curl.h"

@protocol CURLUploadDelegate <NSObject>

-(void)uploadSuccess;

-(void)uploadFailed;

@end

@interface CURLUpload :NSObject

@property (assign ,nonatomic) id<CURLUploadDelegate> delegate;

-(void)uploadFTPFileWith:(NSString*)FTPPath localPath:(NSString*)localPath  userName:(NSString*)userName passWord:(NSString*)passWord hostAdress:(NSString*)hostAdress;

@end

#import "CURLUpload.h"

@implementation CURLUpload

@synthesize delegate;

staticsize_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, stream);

    nread = (curl_off_t)retcode;

    fprintf(stderr,"*** We read %"CURL_FORMAT_CURL_OFF_T

           " bytes from file\n", nread);

   return retcode;

}

-(void)uploadFTPFileWith:(NSString*)FTPPath localPath:(NSString*)localPath  userName:(NSString*)userName passWord:(NSString*)passWord hostAdress:(NSString*)hostAdress{

       CURL *curl;

       CURLcode res;

       FILE *hd_src;

    

   NSString *fileFTPAdress;

//    = [NSString stringWithFormat:@"ftp://%@/%@",hostAdress,FTPPath];

    

    if ([[FTPPathsubstringToIndex:1]isEqualToString:@"/"]) {

        fileFTPAdress = [NSStringstringWithFormat:@"ftp://%@%@",hostAdress,FTPPath];

    }

   else{

        fileFTPAdress = [NSStringstringWithFormat:@"ftp://%@/%@",hostAdress,FTPPath];

    }

   NSString *userNamePassword = [NSStringstringWithFormat:@"%@:%@",userName,passWord];

    ////    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));

   //

    //    }

    //    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 */

//       NSString *filename = [NSString stringWithFormat:@"%@/第1集：课程介绍.mp4",[self localPortraitPath]];

    

        hd_src =fopen(localPath.UTF8String,"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,fileFTPAdress.UTF8String);

    

            /* 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);

           curl_easy_setopt(curl, CURLOPT_USERPWD, userNamePassword.UTF8String);//FTP登陆账号密码，模拟登陆

    

           /* 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));

               if ([delegaterespondsToSelector:@selector(uploadFailed)]) {

                    [delegateperformSelector:@selector(uploadFailed)];

                }

            }

           else{

               if ([delegaterespondsToSelector:@selector(uploadSuccess)]) {

                    [delegateperformSelector:@selector(uploadSuccess)];

                }

            }

           /* 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();

}

@end

下载

@protocol CurlDownloadDelegate <NSObject>

-(void)downloadSuccessCallBack;

-(void)downloadFaildCallBack;

@end

@interface CURLDownload :NSObject

@property (assign,nonatomic) id<CurlDownloadDelegate> delegate;

-(void)downloadFTPFileWith:(NSString*)FTPPath localPath:(NSString*)localPath userName:(NSString*)userName passWord:(NSString*)passWord hostAdress:(NSString*)hostAdress ;

@end

#import "CURLDownload.h"

@implementation CURLDownload

@synthesize delegate;

struct FtpFile {

   const char *filename;

   FILE *stream;

};

staticsize_t my_fwrite(void *buffer,size_t size, size_t nmemb,void *stream)

{

   struct FtpFile *out=(structFtpFile *)stream;

   if(out && !out->stream) {

        

        /* open file for writing */

       out->stream=fopen(out->filename,"wb");

        

       if(!out->stream)

            return -1;/* failure, can't open file to write */

    }

    

   return fwrite(buffer, size, nmemb,out->stream);

}

-(void)downloadFTPFileWith:(NSString*)FTPPath localPath:(NSString*)localPath userName:(NSString*)userName passWord:(NSString*)passWord hostAdress:(NSString*)hostAdress {

   CURL *curl;

   CURLcode res;

    

//    NSString *filename = [NSString stringWithFormat:@"%@/myPortrait.mp4",[self localPortraitPath]];

   NSString *fileFTPAdress;

    if ([[FTPPathsubstringToIndex:1]isEqualToString:@"/"]) {

       fileFTPAdress = [NSStringstringWithFormat:@"ftp://%@%@",hostAdress,FTPPath];

    }

   else{

       fileFTPAdress = [NSStringstringWithFormat:@"ftp://%@/%@",hostAdress,FTPPath];

    }

   NSString *userNamePassword = [NSStringstringWithFormat:@"%@:%@",userName,passWord];

    

   struct FtpFile ftpfile={

        localPath.UTF8String,/* name to store the file as if succesful */

       NULL

    };

    curl_global_init(CURL_GLOBAL_DEFAULT);

    curl =curl_easy_init();

   if(curl) {

       /*

         * You better replace the URL with one that works!

         */

       curl_easy_setopt(curl, CURLOPT_URL,

                         fileFTPAdress.UTF8String);

        /* Define our callback to get called when there's data to be written */

        curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION, my_fwrite);

        /* Set a pointer to our struct to pass to the callback */

        curl_easy_setopt(curl,CURLOPT_WRITEDATA, &ftpfile);

        

        /* Switch on full protocol/debug output */

       curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

       curl_easy_setopt(curl, CURLOPT_USERPWD, userNamePassword.UTF8String);//FTP登陆账号密码，模拟登陆

        res =curl_easy_perform(curl);

        /* always cleanup */

        curl_easy_cleanup(curl);

       if(CURLE_OK != res) {

            /* we failed */

           fprintf(stderr,"curl told us %d\n", res);

           if ([delegaterespondsToSelector:@selector(downloadFaildCallBack)]) {

                [delegateperformSelector:@selector(downloadFaildCallBack)];

            }

        }

       else{

           if ([delegaterespondsToSelector:@selector(downloadSuccessCallBack)]) {

                [delegateperformSelector:@selector(downloadSuccessCallBack)];

            }

        }

    }

   if(ftpfile.stream)

        fclose(ftpfile.stream);/* close the local file */

    curl_global_cleanup();

}

@end