CURL斷點續傳 FTP HTTP

2021-07-29 20:18:31 字數 2517 閱讀 4513

size_t getcontentlengthfunc(void* ptr,size_t size,size_t nmemb,void *stream)

int progresscallback(double dltotal,double dlnow,double ultotal,double ulnow)

; //獲取本地檔案大小資訊

if(stat(localpath,&file_info)==0) 

//追加方式開啟檔案，實現斷點續傳


f=fopen(localpath,"ab+");


if(f==null)


r=curl_easy_setopt(curlhandle,curlopt_url,remotepath);


//連線超時設定


r=curl_easy_setopt(curlhandle,curlopt_connecttimeout,timeout);


//設定頭處理函式


r=curl_easy_setopt(curlhandle,curlopt_headerfunction,getcontentlengthfunc);


r=curl_easy_setopt(curlhandle,curlopt_headerdata,&filesize);


//設定斷點續傳


r=curl_easy_setopt(curlhandle,curlopt_resume_from,use_resume?local_file_len:0);


r=curl_easy_setopt(curlhandle,curlopt_writefunction,writefunc);


r=curl_easy_setopt(curlhandle,curlopt_writedata,f);


r=curl_easy_setopt(curlhandle,curlopt_noprogress,0l);


curl_easy_setopt(curlhandle,curlopt_progressfunction,progresscallback);


r=curl_easy_setopt(curlhandle,curlopt_verbose,1l);


r=curl_easy_perform(curlhandle);


fclose(f);


if(r==curle_ok)


return 1;


else if(r==curle_ftp_couldnt_use_rest)


f=fopen(localpath,"ab+");


if(f==null)


curl_easy_cleanup(curlhandle);


curlhandle=curl_easy_init();


curl_easy_setopt(curlhandle,curlopt_url,remotepath);


//連線超時設定


curl_easy_setopt(curlhandle,curlopt_connecttimeout,timeout);


//設定頭處理函式


curl_easy_setopt(curlhandle,curlopt_headerfunction,getcontentlengthfunc);


curl_easy_setopt(curlhandle,curlopt_headerdata,&filesize);


//設定斷點續傳


curl_easy_setopt(curlhandle,curlopt_resume_from,use_resume?local_file_len:0);


curl_easy_setopt(curlhandle,curlopt_writefunction,writefunc);


curl_easy_setopt(curlhandle,curlopt_writedata,f);


curl_easy_setopt(curlhandle,curlopt_noprogress,0l);


curl_easy_setopt(curlhandle,curlopt_progressfunction,progresscallback);


curl_easy_setopt(curlhandle,curlopt_verbose,1l);


r=curl_easy_perform(curlhandle);


fclose(f);


}else


return 0;
int main()

{ curl *curldwn=null;

curl_global_init(curl_global_all);

curldwn=curl_easy_init();

//1-超時時間


//download(curldwn,"","c:\\22.pdf",1);


download(curldwn,"","c:\\21.pdf",1);


curl_easy_cleanup(curldwn);


curl_global_cleanup();


getchar();


return 0;

HTTP 斷點續傳

客戶端請求域 range 格式如下例子 第乙個500位元組 位元組偏移量0 499,包括0和499 range bytes 0 499 第二個500位元組 位元組偏移量500 999,包括500和999 range bytes 500 999 最後500位元組 位元組偏移量9500 9999,包括9...

IOS斷點續傳

asihttprequest可以實現斷點續傳。網上有一些介紹類似使用 request setallowresumeforfiledownloads yes 不過，通過asihttprequest的非同步請求以及delegate還是可以實現斷點續傳的。本文還是以grails編寫斷點續傳伺服器端為例。非...

linux斷點續傳

在linux伺服器上經常要用scp傳輸大檔案,可能由於網路等原因出現間接性中斷,導致傳輸一半的檔案突然中斷。其實scp是可以續傳的，它需要rsync以及它的ssh協議 舉例如下 rsync p rsh ssh home.tar 192.168.205.34 home home.tar，再輸出密碼後，...