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Added tons of comments all over

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This commit is contained in:
Daniel Stenberg 2001-05-12 16:11:14 +00:00
parent a50fac0e63
commit c7c942861a
1 changed files with 44 additions and 15 deletions
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59
lib/transfer.c
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@ -158,8 +158,19 @@ compareheader(char *headerline, /* line to check */
return FALSE; /* no match */
}
/* Parts of this function was written by the friendly Mark Butler
<butlerm@xmission.com>. */
/*
* Transfer()
*
* This function is what performs the actual transfer. It is capable of
* doing both ways simultaneously.
* The transfer must already have been setup by a call to Curl_Transfer().
*
* Note that headers are created in a preallocated buffer of a default size.
* That buffer can be enlarged on demand, but it is never shrinken again.
*
* Parts of this function was once written by the friendly Mark Butler
* <butlerm@xmission.com>.
*/
CURLcode static
Transfer(struct connectdata *c_conn)
@ -316,7 +327,11 @@ Transfer(struct connectdata *c_conn)
/* no more complete header lines within buffer */
/* copy what is remaining into headerbuff */
int str_length = (int)strlen(str);
/*
* We enlarge the header buffer if it seems to be too
* smallish
*/
if (hbuflen + (int)str_length >= data->headersize) {
char *newbuff;
long newsize=MAX((hbuflen+str_length)*3/2,
@ -339,6 +354,12 @@ Transfer(struct connectdata *c_conn)
str = end_ptr + 1; /* move just past new line */
/*
* We're about to copy a chunk of data to the end of the
* already received header. We make sure that the full string
* fit in the allocated header buffer, or else we enlarge
* it.
*/
if (hbuflen + (str - str_start) >= data->headersize) {
char *newbuff;
long newsize=MAX((hbuflen+(str-str_start))*3/2,
@ -362,23 +383,17 @@ Transfer(struct connectdata *c_conn)
p = data->headerbuff;
/* we now have a full line that p points to */
if (('\n' == *p) || ('\r' == *p)) {
/* Zero-length line means end of header! */
#if 0
if (-1 != conn->size) /* if known */
conn->size += bytecount; /* we append the already read
size */
#endif
/****
* We now have a FULL header line that p points to
*****/
if (('\n' == *p) || ('\r' == *p)) {
/* Zero-length header line means end of headers! */
if ('\r' == *p)
p++; /* pass the \r byte */
if ('\n' == *p)
p++; /* pass the \n byte */
#if 0 /* headers are not included in the size */
Curl_pgrsSetDownloadSize(data, conn->size);
#endif
if(100 == httpcode) {
/*
@ -409,7 +424,7 @@ Transfer(struct connectdata *c_conn)
if(!header) {
/*
* end-of-headers.
* really end-of-headers.
*
* If we requested a "no body", this is a good time to get
* out and return home.
@ -441,6 +456,10 @@ Transfer(struct connectdata *c_conn)
hbuflen = 0;
continue;
}
/*
* Checks for special headers coming up.
*/
if (!headerline++) {
/* This is the first header, it MUST be the error code line
@ -585,6 +604,10 @@ Transfer(struct connectdata *c_conn)
*ptr = backup; /* restore ending letter */
}
/*
* End of header-checks. Write them to the client.
*/
writetype = CLIENTWRITE_HEADER;
if (data->bits.http_include_header)
writetype |= CLIENTWRITE_BODY;
@ -792,6 +815,12 @@ Transfer(struct connectdata *c_conn)
}
}
}
/*
* The tranfer has been performed. Just make some general checks before
* returning.
*/
if(!(data->bits.no_body) && contentlength &&
(bytecount != contentlength)) {
failf(data, "transfer closed with %d bytes remaining to read",