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http.asm
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;asmttpd - Web server for Linux written in amd64 assembly.
;Copyright (C) 2014 Nathan Torchia <[email protected]>
;
;This file is part of asmttpd.
;
;asmttpd is free software: you can redistribute it and/or modify
;it under the terms of the GNU General Public License as published by
;the Free Software Foundation, either version 2 of the License, or
;(at your option) any later version.
;
;asmttpd is distributed in the hope that it will be useful,
;but WITHOUT ANY WARRANTY; without even the implied warranty of
;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;GNU General Public License for more details.
;
;You should have received a copy of the GNU General Public License
;along with asmttpd. If not, see <http://www.gnu.org/licenses/>.
;This writes the text after "Content-Type: " at rsi
detect_content_type: ;rdi - pointer to buffer that contains request, ret - rax: type flag
stackpush
mov rsi, extension_htm
call string_ends_with
mov r10, CONTENT_TYPE_HTML
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_html
call string_ends_with
mov r10, CONTENT_TYPE_HTML
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_css
call string_ends_with
mov r10, CONTENT_TYPE_CSS
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_javascript
call string_ends_with
mov r10, CONTENT_TYPE_JAVASCRIPT
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_xhtml
call string_ends_with
mov r10, CONTENT_TYPE_XHTML
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_xml
call string_ends_with
mov r10, CONTENT_TYPE_XML
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_gif
call string_ends_with
mov r10, CONTENT_TYPE_GIF
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_png
call string_ends_with
mov r10, CONTENT_TYPE_PNG
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_jpeg
call string_ends_with
mov r10, CONTENT_TYPE_JPEG
cmp rax, 1
je detect_content_type_ret
mov rsi, extension_jpg
call string_ends_with
mov r10, CONTENT_TYPE_JPEG
cmp rax, 1
je detect_content_type_ret
mov r10, CONTENT_TYPE_OCTET_STREAM ; default to octet-stream
detect_content_type_ret:
mov rax, r10
stackpop
ret
add_content_type_header: ;rdi - pointer to buffer, rsi - type
stackpush
mov r10, rsi
mov rsi, content_type
call string_concat
cmp r10, CONTENT_TYPE_HTML
je add_response_html
cmp r10, CONTENT_TYPE_OCTET_STREAM
je add_response_octet_stream
cmp r10, CONTENT_TYPE_CSS
je add_response_css
cmp r10, CONTENT_TYPE_JAVASCRIPT
je add_response_javascript
cmp r10, CONTENT_TYPE_XHTML
je add_response_xhtml
cmp r10, CONTENT_TYPE_XML
je add_response_xml
cmp r10, CONTENT_TYPE_GIF
je add_response_gif
cmp r10, CONTENT_TYPE_PNG
je add_response_png
cmp r10, CONTENT_TYPE_JPEG
je add_response_jpeg
jmp add_response_octet_stream
add_response_html:
mov rsi, content_type_html
call string_concat
jmp add_response_cont
add_response_octet_stream:
mov rsi, content_type_octet_stream
call string_concat
jmp add_response_cont
add_response_css:
mov rsi, content_type_css
call string_concat
jmp add_response_cont
add_response_javascript:
mov rsi, content_type_javascript
call string_concat
jmp add_response_cont
add_response_xhtml:
mov rsi, content_type_xhtml
call string_concat
jmp add_response_cont
add_response_xml:
mov rsi, content_type_xml
call string_concat
jmp add_response_cont
add_response_gif:
mov rsi, content_type_gif
call string_concat
jmp add_response_cont
add_response_png:
mov rsi, content_type_png
call string_concat
jmp add_response_cont
add_response_jpeg:
mov rsi, content_type_jpeg
call string_concat
add_response_cont:
stackpop
ret
create_httpError_response: ;rdi - pointer, rsi - error code: 400, 416, 413
stackpush
cmp rsi, 416
je create_httpError_response_416
cmp rsi, 413
je create_httpError_response_413
;garbage/default is 400
mov rsi, http_400
mov rdx, http_400_len
call string_copy
jmp create_httpError_response_cont
create_httpError_response_416:
mov rsi, http_416
mov rdx, http_416_len
call string_copy
jmp create_httpError_response_cont
create_httpError_response_413:
mov rsi, http_413
mov rdx, http_413_len
call string_copy
jmp create_httpError_response_cont
create_httpError_response_cont:
mov rsi, server_header
call string_concat
mov rsi, connection_header
call string_concat
mov rsi, crlfx2
call string_concat
call get_string_length
stackpop
ret
create_http206_response: ;rdi - pointer, rsi - from, rdx - to, r10 - total r9 - type
; looks like Content-Length: `rdx subtract rsi add 1`
; Content-Range: bytes rsi-rdx/r10
stackpush
push rsi
push rdx
mov rsi, http_206 ; copy first one
mov rdx, http_206_len
call string_copy
mov rsi, server_header
call string_concat
mov rsi, connection_header
call string_concat
mov rsi, range_header
call string_concat
mov rsi, r9
call add_content_type_header
mov rsi, content_length
call string_concat
pop rdx
pop rsi
push rsi
mov r8, rdx
sub r8, rsi
inc r8 ; inc cause 'to' is zero based
mov rsi, r8
call string_concat_int
mov rsi, crlf
call string_concat
mov rsi, content_range
call string_concat
pop rsi
call string_concat_int
mov rsi, char_hyphen
call string_concat
mov rsi, rdx
call string_concat_int
mov rsi, char_slash
call string_concat
mov rsi, r10 ; val
call string_concat_int
mov rsi, crlfx2
call string_concat
call get_string_length
jmp create_http206_response_ret
create_http206_response_fail:
mov rax, 0
stackpop
ret
create_http206_response_ret:
stackpop
ret
create_http200_response: ;rdi - pointer to buffer, rsi - type, rdx - length
stackpush
push rdx ; save length
mov r10, rsi ;type
mov rsi, http_200 ;First one we copy
mov rdx, http_200_len
call string_copy
mov rsi, server_header
call string_concat
;mov rsi, connection_header
;call string_concat
mov rsi, range_header
call string_concat
mov rsi, content_length
call string_concat
pop rsi ; length
call string_concat_int
mov rsi, crlf
call string_concat
mov rsi, r10
call add_content_type_header
mov rsi, crlf
call string_concat
call get_string_length
stackpop
ret
create_http404_response: ;rdi - pointer to buffer
stackpush
mov rsi, http_404 ;First one we copy
mov rdx, http_404_len
call string_copy
mov rsi, server_header
call string_concat
mov rsi, connection_header
call string_concat
mov rsi, crlf
call string_concat
mov rsi, http_404_text
call string_concat
mov rsi, crlf
call string_concat
call get_string_length
stackpop
ret