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Regard whitespace Rev 5731 → Rev 5732

/programs/develop/libraries/http/http_en.txt
2,7 → 2,7
get(*url, identifier, flags, *add_header);
*url = pointer to ASCIIZ URL
identifier = identified of previously opened connection, or 0 to open a new one
flags = bit flags (see http.inc user flags)
flags = bit flags (see http.inc user flags and the end of this document)
*add_header = pointer to ASCIIZ additional header parameters, or null for none.
Every additional parameter must end with CR LF bytes, including the last line.
Initiates a HTTP connection, using 'GET' method.
11,7 → 11,7
head(*url, identifier, flags, *add_header);
*url = pointer to ASCIIZ URL
identifier = identified of previously opened connection, or 0 to open a new one
flags = bit flags (see http.inc user flags)
flags = bit flags (see http.inc user flags and the end of this document)
*add_header = pointer to ASCIIZ additional header parameters, or null for none.
Every additional parameter must end with CR LF bytes, including the last line.
Initiate a HTTP connection, using 'HEAD' method.
20,7 → 20,7
post(*url, identifier, flags, *add_header, *content-type, content-length);
*url = pointer to ASCIIZ URL
identifier = identified of previously opened connection, or 0 to open a new one
flags = bit flags (see http.inc user flags)
flags = bit flags (see http.inc user flags and the end of this document)
*add_header = pointer to ASCIIZ additional header parameters, or null for none.
Every additional parameter must end with CR LF bytes, including the last line.
*content-type = pointer to ASCIIZ string containing content type.
35,6 → 35,7
This procedure will handle all incoming data for a connection and place it in the buffer.
As long as the procedure expects more data, -1 is returned and the procedure must be called again.
- When transfer is done, the procedure will return 0.
The receive procedure is non-blocking by default, but can be made to block by setting FLAG_BLOCK.
 
The HTTP header is placed together with some flags and other attributes in the http_msg structure.
This structure is defined in http.inc (and not copied here because it might still change.)
55,4 → 56,19
This procedure can be used to send data to the server (POST)
- returns number of bytes sent, -1 on error
 
All procedures are non blocking!
User flags:
 
FLAG_KEEPALIVE will keep the connection open after first GET/POST/.. so you can send a second request on the same TCP session.
In this case, the session must be closed manually when done by using the exported disconnect() function.
 
FLAG_STREAM will force receive() to put the received content in a series of fixed size buffers, instead of everything in one big buffer.
This can be used for example to receive an internet radio stream,
but also to download larger files for which it does not make sense to put them completely in RAM first.
 
FLAG_REUSE_BUFFER is to be used in combination with FLAG_STREAM and will make receive() function re-use the same buffer.
This, for example, can be used when downloading a file straight to disk.
 
FLAG_BLOCK will make receive() function blocking. This is only to be used when receiving one file from a thread that has no other work.
If however, you want to receive multiple files, or do other things in the program mainloop,
you should use system function 10 or 23 to wait for network event before calling one or more receive() functions.