On 3/11/2015 12:35 PM, 兰天 wrote:
>
> My write callback function is follow:
>
> int Writer(char *data, size_t size, size_t nmemb, void *stream)
>
> {
>
> CURL_DATA_INFO *out = (CURL_DATA_INFO *) stream;
>
> unsigned int uiSizes = size * nmemb;
>
> unsigned int uiLoadContentLen = 0;
>
> if (NULL == out || 0 == size || 0 == nmemb)
>
> {
>
> LOG_ERR("NULL == out || 0 == size || 0 == nmemb");
>
> //return -1;
>
> }
>
>
> if ( uiSizes <= out->uiBufLen - out->uiWriteBufLen)
>
> {
>
> //LOG_DBG("uiSizes:%u,buffer length:%u,writen
> lengh:%u",uiSizes,out->uiBufLen, out->uiWriteBufLen);
>
> memcpy(out->pszDownBuf + out->uiWriteBufLen, data, uiSizes);
>
> out->uiWriteBufLen += uiSizes;
>
> if(out->uiWriteBufLen > out->uiBufLen)
>
> {
>
> LOG_ERR("invalid write buf len:%u", out->uiWriteBufLen);
>
> }
>
> uiLoadContentLen = uiSizes;
>
> return uiLoadContentLen;
>
> }
>
> else
>
> {
>
> LOG_ERR("too large file, size=%u, writen=%u", uiSizes,
> out->uiWriteBufLen);
>
> //return -2;
>
> }
>
> //return 0;
>
> }
>
> after I running the program for 2 hours ,the programe stop
> with the follow infomations:
>
> * Failed writing body (1 != 16384)
>
> * Closing connection #21
>
> * Failed writing body (1 != 16384)
>
> * Closing connection #7
>
> * Operation timed out after 40000 milliseconds with 186810
> out of 269621 bytes received
>
> * Closing connection #58
>

Thank you for not top posting however your mail client is now garbling
the quoting. The e-mail you sent makes your reply look like it's a reply
I made. You may be able to fix that by hitting enter twice below
whatever you've quoted.

As I said you need to review CURLOPT_WRITEFUNCTION [1]. Your function
prototype should be:

size_t write_callback(char *ptr, size_t size, size_t nmemb, void *userdata);

Your callback must always return a value and it's not doing that. Also
you need to properly handle 0 bytes, for example if(!uiSizes) return 0.

I'm still curious what version of libcurl is actually loaded here. If
you could dump the version as I showed in my previous e-mail that would
help.

[1]: http://curl.haxx.se/libcurl/c/CURLOPT_WRITEFUNCTION.html

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Received on 2015-03-12