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3 # Licensed under the Apache License, Version 2.0 (the "License");
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7 # http://www.apache.org/licenses/LICENSE-2.0
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12 # See the License for the specific language governing permissions and
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15 # Http request parsing for buffered inputs.
16 module http_request_buffer
18 intrude import libevent
20 # Connection rebuilding HTTP requests
22 # Subclass should refine `read_full_request` and avoid `read_callback`.
26 private var in_request
= false
27 private var in_header
= false
28 private var in_body
= false
29 private var current_header
= new Array[Writable]
30 private var current_body
= new Array[Writable]
31 private var content_length
= 0
32 private var current_length
= 0
34 redef fun read_callback_native
(cstr
, len
)
35 # FIXME will not work if the header/body delimiter falls between two watermarks windows.
37 # is this the start of a request?
38 var str
= cstr
.to_s_with_length
(len
)
39 if not in_request
then parse_start
44 body
= parse_header
(str
)
49 if in_body
then parse_body
(body
)
53 # Prepare for a new request
54 private fun parse_start
do
61 # next step is to find the header part
66 # We are receiving the header of a request
68 # Return parsed body found in header window
69 private fun parse_header
(str
: String): String do
71 var parts
= str
.split
("\r\n\r\n")
72 # first part go in the header
73 current_header
.add parts
.shift
75 # if there is more part we are done with headers
76 if not parts
.is_empty
then
78 parse_content_length current_header
.join
79 # next step if to parse body
82 # return rest of the body
83 return parts
.join
("\r\n")
88 # Extract and set `content_length` from header.
89 private fun parse_content_length
(head
: String) do
90 var hlines
= head
.split
("\r\n")
91 for hline
in hlines
do
92 var hparts
= hline
.split
(": ")
93 if hparts
.first
== "Content-Length" then
94 content_length
= hparts
[1].to_i
99 # We are receiving body parts.
100 private fun parse_body
(str
: String) do
101 current_length
+= str
.length
103 if current_length
>= content_length
then
108 # We have reached the end of the body
109 private fun parse_end
do
110 var res
= new FlatBuffer.with_capacity
(content_length
)
111 for ch
in current_header
do res
.append ch
.write_to_string
112 res
.append
"\r\n\r\n"
113 for cb
in current_body
do res
.append cb
.write_to_string
114 read_callback
(res
.write_to_string
)