prosody
7076ed654ac9
net/http/parser.lua

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net/http/parser.lua @ 11020:7076ed654ac9

net.http.parser: Switch to util.dbuffer for buffering incoming data This is primarily a step towards saving uploads directly to files, tho this should hopefully be more efficient than collapsing the entire buffer to a single string every now and then.
author Kim Alvefur <zash@zash.se>
date Sat, 01 Aug 2020 18:14:09 +0200
parent 10580:b7c5d7bae4ef
child 11021:9673c95895fb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
1 local tonumber = tonumber;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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2 local assert = assert;
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d54999db3aa1 net.http.parser: Do full URL decoding and parsing (e.g. adds request.url.query when present)
Matthew Wild <mwild1@gmail.com>
parents: 4716
diff changeset
3 local url_parse = require "socket.url".parse;
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274c10668fe8 net.http.parser: Depend on util.http instead of net.http for urlencode
Matthew Wild <mwild1@gmail.com>
parents: 5323
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4 local urldecode = require "util.http".urldecode;
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7076ed654ac9 net.http.parser: Switch to util.dbuffer for buffering incoming data
Kim Alvefur <zash@zash.se>
parents: 10580
diff changeset
5 local dbuffer = require "util.dbuffer";
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parents:
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6
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6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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7 local function preprocess_path(path)
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61c47d26481d net.http.parser: Fix syntax error introduced in c5edb08fc7cb.
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8 path = urldecode((path:gsub("//+", "/")));
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6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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9 if path:sub(1,1) ~= "/" then
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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10 path = "/"..path;
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parents: 4712
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11 end
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parents: 4712
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12 local level = 0;
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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13 for component in path:gmatch("([^/]+)/") do
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parents: 4712
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14 if component == ".." then
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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15 level = level - 1;
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
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parents: 4712
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16 elseif component ~= "." then
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
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parents: 4712
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17 level = level + 1;
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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18 end
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Matthew Wild <mwild1@gmail.com>
parents: 4712
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19 if level < 0 then
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
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20 return nil;
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21 end
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22 end
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23 return path;
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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24 end
6eeb142a8073 mod_http_files, net.http.parser: Move path normalization to net.http.parser so that all modules can benefit
Matthew Wild <mwild1@gmail.com>
parents: 4712
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25
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fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
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26 local httpstream = {};
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27
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28 function httpstream.new(success_cb, error_cb, parser_type, options_cb)
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29 local client = true;
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30 if not parser_type or parser_type == "server" then client = false; else assert(parser_type == "client", "Invalid parser type"); end
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65bf55fdf971 net.http.parser: Allow limits to be configurable via options callback
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31 local bodylimit = tonumber(options_cb and options_cb().body_size_limit) or 10*1024*1024;
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32 -- https://stackoverflow.com/a/686243
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33 -- Indiviual headers can be up to 16k? What madness?
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34 local headlimit = tonumber(options_cb and options_cb().head_size_limit) or 10*1024;
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65bf55fdf971 net.http.parser: Allow limits to be configurable via options callback
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35 local buflimit = tonumber(options_cb and options_cb().buffer_size_limit) or bodylimit * 2;
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Kim Alvefur <zash@zash.se>
parents: 10580
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36 local buffer = dbuffer.new(buflimit);
7076ed654ac9 net.http.parser: Switch to util.dbuffer for buffering incoming data
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37 local chunked;
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fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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38 local state = nil;
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39 local packet;
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40 local len;
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41 local have_body;
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42 local error;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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43 return {
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a15ce0014ac9 net.http.parser: Remove unused argument [luacheck]
Kim Alvefur <zash@zash.se>
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44 feed = function(_, data)
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parents:
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45 if error then return nil, "parse has failed"; end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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46 if not data then -- EOF
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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47 if state and client and not len then -- reading client body until EOF
11020
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Kim Alvefur <zash@zash.se>
parents: 10580
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48 buffer:collapse();
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49 packet.body = buffer:read_chunk() or "";
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parents:
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50 success_cb(packet);
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51 state = nil;
7076ed654ac9 net.http.parser: Switch to util.dbuffer for buffering incoming data
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52 elseif buffer:length() ~= 0 then -- unexpected EOF
8045
55a56dc935f2 net.http: Pass error all the way to callback
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53 error = true; return error_cb("unexpected-eof");
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fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
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54 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
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55 return;
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56 end
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57 if not buffer:write(data) then error = true; return error_cb("max-buffer-size-exceeded"); end
7076ed654ac9 net.http.parser: Switch to util.dbuffer for buffering incoming data
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58 while buffer:length() > 0 do
4631
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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59 if state == nil then -- read request
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60 local index = buffer:sub(1, headlimit):find("\r\n\r\n", nil, true);
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fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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61 if not index then return; end -- not enough data
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375d31225d53 net.http.parser: Silence warning about unused variable [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8045
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62 -- FIXME was reason_phrase meant to be passed on somewhere?
375d31225d53 net.http.parser: Silence warning about unused variable [luacheck]
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parents: 8045
diff changeset
63 local method, path, httpversion, status_code, reason_phrase; -- luacheck: ignore reason_phrase
4631
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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64 local first_line;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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65 local headers = {};
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66 for line in buffer:read(index+3):gmatch("([^\r\n]+)\r\n") do -- parse request
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parents:
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67 if first_line then
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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68 local key, val = line:match("^([^%s:]+): *(.*)$");
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parents:
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69 if not key then error = true; return error_cb("invalid-header-line"); end -- TODO handle multi-line and invalid headers
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70 key = key:lower();
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71 headers[key] = headers[key] and headers[key]..","..val or val;
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72 else
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73 first_line = line;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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74 if client then
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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75 httpversion, status_code, reason_phrase = line:match("^HTTP/(1%.[01]) (%d%d%d) (.*)$");
5462
3ecae471d9dd net.http.parser: Convert status_code to a number before trying to compare it to numbers
Matthew Wild <mwild1@gmail.com>
parents: 5461
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76 status_code = tonumber(status_code);
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77 if not status_code then error = true; return error_cb("invalid-status-line"); end
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78 have_body = not
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79 ( (options_cb and options_cb().method == "HEAD")
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80 or (status_code == 204 or status_code == 304 or status_code == 301)
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81 or (status_code >= 100 and status_code < 200) );
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82 else
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83 method, path, httpversion = line:match("^(%w+) (%S+) HTTP/(1%.[01])$");
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84 if not method then error = true; return error_cb("invalid-status-line"); end
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85 end
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86 end
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87 end
5291
01f7522049fb net.http.parser: Abort if no status line is received.
Kim Alvefur <zash@zash.se>
parents: 5259
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88 if not first_line then error = true; return error_cb("invalid-status-line"); end
5463
111953bfe767 net.http.parser: Fix chunked encoding response parsing, and make it more robust
Matthew Wild <mwild1@gmail.com>
parents: 5462
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89 chunked = have_body and headers["transfer-encoding"] == "chunked";
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90 len = tonumber(headers["content-length"]); -- TODO check for invalid len
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d3646443a02e net.http.parser: Add a limit on content length, default to 10M
Kim Alvefur <zash@zash.se>
parents: 7575
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91 if len and len > bodylimit then error = true; return error_cb("content-length-limit-exceeded"); end
10580
b7c5d7bae4ef net.http.parser: Add TODO related to #726
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parents: 10540
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92 -- TODO ask a callback whether to proceed in case of large requests or Expect: 100-continue
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93 if client then
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94 -- FIXME handle '100 Continue' response (by skipping it)
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95 if not have_body then len = 0; end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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96 packet = {
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97 code = status_code;
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98 httpversion = httpversion;
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99 headers = headers;
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100 body = false;
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101 -- COMPAT the properties below are deprecated
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102 responseversion = httpversion;
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103 responseheaders = headers;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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104 };
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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105 else
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c85c348253bd net.http.parser: Skip url.parse when we don't have a full URL (also fixes traceback on paths starting with '//').
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parents: 5222
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106 local parsed_url;
c85c348253bd net.http.parser: Skip url.parse when we don't have a full URL (also fixes traceback on paths starting with '//').
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parents: 5222
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107 if path:byte() == 47 then -- starts with /
c85c348253bd net.http.parser: Skip url.parse when we don't have a full URL (also fixes traceback on paths starting with '//').
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parents: 5222
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108 local _path, _query = path:match("([^?]*).?(.*)");
c85c348253bd net.http.parser: Skip url.parse when we don't have a full URL (also fixes traceback on paths starting with '//').
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parents: 5222
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109 if _query == "" then _query = nil; end
c85c348253bd net.http.parser: Skip url.parse when we don't have a full URL (also fixes traceback on paths starting with '//').
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parents: 5222
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110 parsed_url = { path = _path, query = _query };
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parents: 5222
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111 else
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112 parsed_url = url_parse(path);
5323
4c30f638ff55 net.http.parser: Ensure full URL in status line contains a path.
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parents: 5322
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113 if not(parsed_url and parsed_url.path) then error = true; return error_cb("invalid-url"); end
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114 end
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d54999db3aa1 net.http.parser: Do full URL decoding and parsing (e.g. adds request.url.query when present)
Matthew Wild <mwild1@gmail.com>
parents: 4716
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115 path = preprocess_path(parsed_url.path);
4879
45bb378a4a98 net.http.parser: Keep the Host header no host is present in the URI
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parents: 4866
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116 headers.host = parsed_url.host or headers.host;
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117
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118 len = len or 0;
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119 packet = {
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120 method = method;
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121 url = parsed_url;
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122 path = path;
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123 httpversion = httpversion;
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124 headers = headers;
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125 body = false;
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126 body_sink = nil;
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127 };
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128 end
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129 if chunked then
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130 packet.body_buffer = dbuffer.new(buflimit);
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131 end
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132 state = true;
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133 end
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134 if state then -- read body
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135 if chunked then
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136 local chunk_header = buffer:sub(1, 512); -- XXX How large do chunk headers grow?
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137 local chunk_size, chunk_start = chunk_header:match("^(%x+)[^\r\n]*\r\n()");
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138 if not chunk_size then return; end
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139 chunk_size = chunk_size and tonumber(chunk_size, 16);
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140 if not chunk_size then error = true; return error_cb("invalid-chunk-size"); end
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141 if chunk_size == 0 and chunk_header:find("\r\n\r\n", chunk_start-2, true) then
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142 local body_buffer = packet.body_buffer;
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143 if body_buffer then
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144 packet.body_buffer = nil;
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145 body_buffer:collapse();
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146 packet.body = body_buffer:read_chunk() or "";
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147 end
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148
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149 buffer:collapse();
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150 local buf = buffer:read_chunk();
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151 buf = buf:gsub("^.-\r\n\r\n", ""); -- This ensure extensions and trailers are stripped
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152 buffer:write(buf);
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153 state, chunked = nil, nil;
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154 success_cb(packet);
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155 elseif buffer:length() - chunk_start - 2 >= chunk_size then -- we have a chunk
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156 buffer:discard(chunk_start - 1); -- TODO verify that it's not off-by-one
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157 packet.body_buffer:write(buffer:read(chunk_size));
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158 buffer:discard(2); -- CRLF
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159 else -- Partial chunk remaining
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160 break;
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161 end
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162 elseif buffer:length() >= len then
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163 assert(not chunked)
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164 packet.body = buffer:read(len) or "";
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165 state = nil; success_cb(packet);
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166 else
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167 break;
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168 end
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169 else
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170 break;
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171 end
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172 end
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173 end;
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174 };
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175 end
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176
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177 return httpstream;