mirror of
https://github.com/Doczom/simple-httpd.git
synced 2025-09-21 22:53:54 +02:00
Added basic files
Added basic files: - httpd.asm - main loop server, include other files; - httpd_lib - file for data(constants, response string, headers etc.); - parser.inc - function for generation structure of HTTP request; - settings.inc - description request structure and function for read config file; - sys_func.inc - list function, for worked with sockets, filesystem and other functions system; NOTE: The server does not work in this version, but the main loop and the parser work.
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254
parser.inc
Normal file
254
parser.inc
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@@ -0,0 +1,254 @@
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BASE_ARRAY_ARGS equ (esi - 1024)
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BASE_ARRAY_HEADERS equ (esi - 2048)
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; IN:
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; esi - struct
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; ecx = ptr to str URI
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; OUT:
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; ecx - new base for reading data ('HTTP/1.1 ...')
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; eax -
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; NOTE: this function don`t check buffer size
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parse_url:
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; URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
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;
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; hier-part = "//" authority path-abempty
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; / path-absolute
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; / path-rootless
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; / path-empty
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;
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; foo://example.com:8042/over/there?name=ferret#nose
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; \_/ \______________/\_________/ \_________/ \__/
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; | | | | |
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; scheme authority path query fragment
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; | _____________________|__
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; / \ / \
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; urn:example:animal:ferret:nose
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cmp byte[ecx], '/' ; check abs-path
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je .get_path
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;get scheme
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mov [esi + CONNECT_DATA.uri_scheme], ecx
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@@:
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inc ecx
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cmp byte[ecx - 1], ':'
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jne @b
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mov byte[ecx - 1], 0
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cmp word[ecx], '//'
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jne .get_path
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add ecx, 2
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mov [esi + CONNECT_DATA.uri_authority], ecx
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;get authority
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@@:
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inc ecx
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;cmp byte[ecx - 1], ' ' ;check end, не нужно, так как в http всегда / абс путь
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cmp byte[ecx - 1], '/'
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jne @b
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dec ecx
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.get_path:
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;path-absolute
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mov [esi + CONNECT_DATA.uri_path], ecx
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@@:
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inc ecx
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cmp byte[ecx], '?'
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je .get_query
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cmp byte[ecx], '#'
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je get_fragment
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cmp byte[ecx], ' ' ; check end path
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jne @b
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mov byte[ecx], 0
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inc ecx
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jmp .exit
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.get_query:
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mov byte[ecx], 0
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inc ecx
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lea eax, [BASE_ARRAY_ARGS]
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mov dword[esi + CONNECT_DATA.uri_arg], eax
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xor edx, edx ; counter items
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; add new item
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.get_query_new_arg:
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inc edx
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mov dword[BASE_ARRAY_ARGS + (edx-1)*8], ecx
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mov [esi + CONNECT_DATA.num_uri_args], edx
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dec ecx
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@@:
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inc ecx
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cmp byte[ecx], '='
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je .get_args
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cmp byte[ecx], '#' ; ЭТО БРЕД ПОЛНЫЙ, НО ВДРУГ
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je .get_fragment
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cmp byte[ecx], ' ' ; http://cjkhr.bvgbfdkvdf.dmejfgehf/?1pr1
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jne @b
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.exit_2:
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mov byte[ecx], 0
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inc ecx
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jmp .exit
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.get_args:
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mov byte[ecx], 0
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inc ecx
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mov dword[BASE_ARRAY_ARGS + (edx-1)*8 + 4], ecx
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dec ecx
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@@:
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inc ecx
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cmp byte[ecx], '#'
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je .get_fragment
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cmp byte[ecx], ' '
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je .exit_2
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cmp byte[ecx] '&'
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jne @b
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jmp .get_query_new_arg
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.get_fragment:
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cmp byte[ecx], '#'
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jne .exit
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mov byte[ecx], 0
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inc ecx
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mov [esi + CONNECT_DATA.uri_fragment], ecx
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@@:
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inc ecx
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cmp byte[ecx - 1], ' '
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jne @b
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mov [ecx - 1], 0
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.exit:
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ret
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; IN:
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; esi - struct
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; ecx - ptr to begin headers block
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; edx - free mem ptr
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; OUT:
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; ecx - new base for reading body message HTTP query
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; eax -
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; NOTE: this function don`t check buffer size
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parse_headers:
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; init array
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mov [esi + CONNECT_DATA.num_headers], 0
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mov [esi + CONNECT_DATA.http_headers], BASE_ARRAY_HEADERS
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xor edx, edx
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.new_str:
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cmp word[ecx], 0x0A0D ; \n
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jnz .find_header
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; end find heeaders
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add ecx, 2 ; ecx = base for body message
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ret
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.find_header:
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; add new item in array headers
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inc edx
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mov dword[esi + CONNECT_DATA.num_headers], edx
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; save pointer to name header
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mov dword[BASE_ARRAY_HEADERS + (edx-1)*8], ecx
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dec ecx
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@@:
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inc ecx
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cmp byte[ecx], ':'
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jnz @b
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mov byte[ecx], 0 ; \0
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inc ecx
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; save pointer to value
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mov dword[BASE_ARRAY_HEADERS + (edx-1)*8 + 4], ecx
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@@:
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inc ecx
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cmp byte[ecx - 1], 0x0A0D
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jnz @b
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mov byte[ecx - 1], 0
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inc ecx ; set offset on new string
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jmp .new_str
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; IN:
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; ecx - raw data query
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; esi - ptr to CONNECT_DATA
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; OUT: eax = 0 error
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; eax = prt to struct CONNECT_DATA
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parse_http_query:
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;method scheme://host:port/abs_path HTTP/1.1 0x0d 0x0a
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;header_1:value 0x0d 0x0a
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; ...
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;header_N:value 0x0d 0x0a
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;0xd 0xa
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; message data
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mov eax, [esi + CONNECT_DATA.request_size]
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mov [esi + CONNECT_DATA.tmp_req_size], eax
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; check size
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cmp dword[esi + CONNECT_DATA.request_size], min_http_size
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jb .error_exit
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; get http METHOD this message
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mov [esi + CONNECT_DATA.http_method], ecx
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@@:
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inc ecx
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cmp byte[ecx - 1], ' ' ; find end method
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jnz @b
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mov byte[ecx - 1], 0
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; check size
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mov edx, ecx
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sub edx, [esi + CONNECT_DATA.buffer_request]
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sub edx, 2 ; / 0x20
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cmp dword[esi + CONNECT_DATA.request_size], edx
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jle .error_exit
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; ecx <- uri string
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; парсинг uri строки в заголовке запроса(получение схемы, пути аргументов, фрагмента и тд)
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call parse_url
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; check size
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mov edx, ecx
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sub edx, [esi + CONNECT_DATA.buffer_request]
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sub edx, 7 ; H/0.0 0x0d0 x0a
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cmp dword[esi + CONNECT_DATA.request_size], edx
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jle .error_exit
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; get http version(HTTP/1.1)
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mov [esi + CONNECT_DATA.http_verion], ecx
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@@:
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inc ecx
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cmp word[ecx - 1], 0x0A0D
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jnz @b
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mov word[ecx - 1], 0
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inc ecx ; <- start first header
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; check size
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mov edx, ecx
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sub edx, [esi + CONNECT_DATA.buffer_request]
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sub edx, 2 ; 0x0d 0x0a
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cmp dword[esi + CONNECT_DATA.request_size], edx
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jle .error_exit
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; получение заголовков запроса (ключ + значение-строка)
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call parse_headers
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; check size
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mov edx, ecx
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sub edx, [esi + CONNECT_DATA.buffer_request]
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cmp dword[esi + CONNECT_DATA.request_size], edx
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jl .error_exit
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mov [esi + CONNECT_DATA.message_body], ecx
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; докачивается всё остальное
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mov eax, esi
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ret
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.error_exit:
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xor eax, eax
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ret
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