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http library: allow caller to make receive() blocking. Reduced debug output. Updated documentation.

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git-svn-id: svn://kolibrios.org@5732 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2015-08-17 10:33:23 +00:00
parent 1a4da7ef10
commit 2f4b8c666c
3 changed files with 44 additions and 22 deletions
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41
programs/develop/libraries/http/http.asm
View File

@ -23,7 +23,7 @@
TIMEOUT = 500 ; in 1/100 s
__DEBUG__ = 1
__DEBUG_LEVEL__ = 1
__DEBUG_LEVEL__ = 2
format MS COFF
@ -117,7 +117,7 @@ lib_init: ;//////////////////////////////////////////////////////////////////;;
ret
.error:
DEBUGF 1, "ERROR loading libraries\n"
DEBUGF 2, "ERROR loading http.obj dependencies\n"
xor eax, eax
inc eax
ret
@ -145,7 +145,7 @@ proc HTTP_disconnect identifier ;///////////////////////////////////////////////
ret
.error:
DEBUGF 1, "Cant close already closed connection!\n"
DEBUGF 2, "Cant close already closed connection!\n"
popa
ret
@ -313,7 +313,7 @@ endl
ret
.error:
DEBUGF 1, "Error!\n"
DEBUGF 2, "HTTP GET error!\n"
popa
xor eax, eax ; return 0 = error
ret
@ -455,7 +455,7 @@ endl
ret
.error:
DEBUGF 1, "Error!\n"
DEBUGF 2, "HTTP HEAD error!\n"
popa
xor eax, eax ; return 0 = error
ret
@ -615,7 +615,7 @@ endl
ret
.error:
DEBUGF 1, "Error!\n"
DEBUGF 1, "HTTP POST error!\n"
popa
xor eax, eax ; return 0 = error
ret
@ -668,8 +668,13 @@ proc HTTP_receive identifier ;//////////////////////////////////////////////////
; Receive some data
.receive:
mov edi, MSG_DONTWAIT
test [ebp + http_msg.flags], FLAG_BLOCK
jz @f
xor edi, edi
@@:
mcall recv, [ebp + http_msg.socket], [ebp + http_msg.write_ptr], \
[ebp + http_msg.buffer_length], MSG_DONTWAIT
[ebp + http_msg.buffer_length]
cmp eax, 0xffffffff
je .check_socket
@ -1082,28 +1087,28 @@ proc HTTP_receive identifier ;//////////////////////////////////////////////////
jz .got_all_data
.err_server_closed:
pop eax
DEBUGF 1, "ERROR: server closed connection unexpectedly\n"
DEBUGF 2, "ERROR: server closed connection unexpectedly\n"
or [ebp + http_msg.flags], FLAG_TRANSFER_FAILED
jmp .abort
.err_header:
pop eax
DEBUGF 1, "ERROR: invalid header\n"
DEBUGF 2, "ERROR: invalid header\n"
or [ebp + http_msg.flags], FLAG_INVALID_HEADER
jmp .abort
.err_no_ram:
DEBUGF 1, "ERROR: out of RAM\n"
DEBUGF 2, "ERROR: out of RAM\n"
or [ebp + http_msg.flags], FLAG_NO_RAM
jmp .abort
.err_timeout:
DEBUGF 1, "ERROR: timeout\n"
DEBUGF 2, "ERROR: timeout\n"
or [ebp + http_msg.flags], FLAG_TIMEOUT_ERROR
jmp .abort
.err_socket:
DEBUGF 1, "ERROR: socket error %u\n", ebx
DEBUGF 2, "ERROR: socket error %u\n", ebx
or [ebp + http_msg.flags], FLAG_SOCKET_ERROR
.abort:
and [ebp + http_msg.flags], not FLAG_CONNECTED
@ -1268,7 +1273,7 @@ proc HTTP_find_header_field identifier, headername ;////////////////////////////
ret
.fail:
DEBUGF 1, "Header field not found\n"
DEBUGF 2, "Header field not found\n"
pop edi esi edx ecx ebx
xor eax, eax
ret
@ -1342,7 +1347,7 @@ proc HTTP_escape URI, length ;//////////////////////////////////////////////////
ret
.error:
DEBUGF 1, "ERROR: out of RAM!\n"
DEBUGF 2, "ERROR: out of RAM!\n"
popa
xor eax, eax
ret
@ -1405,7 +1410,7 @@ proc HTTP_unescape URI, length ;////////////////////////////////////////////////
jmp .loop
.fail:
DEBUGF 1, "ERROR: invalid URI!\n"
DEBUGF 2, "ERROR: invalid URI!\n"
jmp .loop
.done:
@ -1415,7 +1420,7 @@ proc HTTP_unescape URI, length ;////////////////////////////////////////////////
ret
.error:
DEBUGF 1, "ERROR: out of RAM!\n"
DEBUGF 2, "ERROR: out of RAM!\n"
popa
xor eax, eax
ret
@ -1659,12 +1664,12 @@ endl
ret
.no_mem:
DEBUGF 1, "Out of memory!\n"
DEBUGF 2, "Out of memory!\n"
xor eax, eax
ret
.invalid:
DEBUGF 1, "Invalid URL!\n"
DEBUGF 2, "Invalid URL!\n"
xor eax, eax
ret

1
programs/develop/libraries/http/http.inc
View File

@ -27,6 +27,7 @@ FLAG_CONNECTED = 1 shl 5
FLAG_KEEPALIVE = 1 shl 8
FLAG_STREAM = 1 shl 9
FLAG_REUSE_BUFFER = 1 shl 10
FLAG_BLOCK = 1 shl 11
; error
FLAG_INVALID_HEADER = 1 shl 16

24
programs/develop/libraries/http/http_en.txt
View File

@ -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 @@ Initiates a HTTP connection, using 'GET' method.
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 @@ Initiate a HTTP connection, using 'HEAD' method.
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 @@ receive(identifier);
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 @@ send(identifier, *dataptr, datalength);
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.