/* Curl_client_write() sends data to the write callback(s)
The bit pattern defines to what "streams" to write to. Body and/or header.
The defines are in sendf.h of course.
If CURL_DO_LINEEND_CONV is enabled, data is converted IN PLACE to the
local character encoding. This is a problem and should be changed in
the future to leave the original data alone.
*/
CURLcode Curl_client_write(struct connectdata *conn,
int type,
char *ptr,
size_t len)
{
struct SessionHandle *data = conn->data;
if(0 == len)
len = strlen(ptr);
/* FTP data may need conversion. */
if((type & CLIENTWRITE_BODY) &&
(conn->handler->protocol & PROTO_FAMILY_FTP) &&
conn->proto.ftpc.transfertype == 'A') {
/* convert from the network encoding */
CURLcode result = Curl_convert_from_network(data, ptr, len);
/* Curl_convert_from_network calls failf if unsuccessful */
if(result)
return result;
#ifdef CURL_DO_LINEEND_CONV
/* convert end-of-line markers */
len = convert_lineends(data, ptr, len);
#endif /* CURL_DO_LINEEND_CONV */
}
return Curl_client_chop_write(conn, type, ptr, len);
}
/*
* curl_easy_pause() allows an application to pause or unpause a specific
* transfer and direction. This function sets the full new state for the
* current connection this easy handle operates on.
*
* NOTE: if you have the receiving paused and you call this function to remove
* the pausing, you may get your write callback called at this point.
*
* Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
*/
CURLcode curl_easy_pause(struct Curl_easy *data, int action)
{
struct SingleRequest *k = &data->req;
CURLcode result = CURLE_OK;
/* first switch off both pause bits */
int newstate = k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
/* set the new desired pause bits */
newstate |= ((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
/* put it back in the keepon */
k->keepon = newstate;
if(!(newstate & KEEP_RECV_PAUSE) && data->state.tempcount) {
/* there are buffers for sending that can be delivered as the receive
pausing is lifted! */
unsigned int i;
unsigned int count = data->state.tempcount;
struct tempbuf writebuf[3]; /* there can only be three */
/* copy the structs to allow for immediate re-pausing */
for(i=0; i < data->state.tempcount; i++) {
writebuf[i] = data->state.tempwrite[i];
data->state.tempwrite[i].buf = NULL;
}
data->state.tempcount = 0;
for(i=0; i < count; i++) {
/* even if one function returns error, this loops through and frees all
buffers */
if(!result)
result = Curl_client_chop_write(data->easy_conn,
writebuf[i].type,
writebuf[i].buf,
writebuf[i].len);
free(writebuf[i].buf);
}
if(result)
return result;
}
/* if there's no error and we're not pausing both directions, we want
to have this handle checked soon */
if(!result &&
((newstate&(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) !=
(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) )
Curl_expire(data, 0, EXPIRE_RUN_NOW); /* get this handle going again */
return result;
}
/*
* curl_easy_pause() allows an application to pause or unpause a specific
* transfer and direction. This function sets the full new state for the
* current connection this easy handle operates on.
*
* NOTE: if you have the receiving paused and you call this function to remove
* the pausing, you may get your write callback called at this point.
*
* Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
*/
CURLcode curl_easy_pause(CURL *curl, int action)
{
struct SessionHandle *data = (struct SessionHandle *)curl;
struct SingleRequest *k = &data->req;
CURLcode result = CURLE_OK;
/* first switch off both pause bits */
int newstate = k->keepon &~ (KEEP_RECV_PAUSE| KEEP_SEND_PAUSE);
/* set the new desired pause bits */
newstate |= ((action & CURLPAUSE_RECV)?KEEP_RECV_PAUSE:0) |
((action & CURLPAUSE_SEND)?KEEP_SEND_PAUSE:0);
/* put it back in the keepon */
k->keepon = newstate;
if(!(newstate & KEEP_RECV_PAUSE) && data->state.tempwrite) {
/* we have a buffer for sending that we now seem to be able to deliver
since the receive pausing is lifted! */
/* get the pointer in local copy since the function may return PAUSE
again and then we'll get a new copy allocted and stored in
the tempwrite variables */
char *tempwrite = data->state.tempwrite;
data->state.tempwrite = NULL;
result = Curl_client_chop_write(data->easy_conn, data->state.tempwritetype,
tempwrite, data->state.tempwritesize);
free(tempwrite);
}
/* if there's no error and we're not pausing both directions, we want
to have this handle checked soon */
if(!result &&
((newstate&(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) !=
(KEEP_RECV_PAUSE|KEEP_SEND_PAUSE)) )
Curl_expire(data, 1); /* get this handle going again */
return result;
}
