From 28d571b7cca709641d964e00e6004facb6bfcc7e Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Wed, 4 Feb 2009 14:30:40 -0800
Subject: s/Mongrel/Unicorn/g

Avoid conflicting with existing Mongrel libraries since
we'll be incompatible and break things w/o disrupting
Mongrel installations.
---
 lib/unicorn/http_request.rb | 106 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 lib/unicorn/http_request.rb

(limited to 'lib/unicorn/http_request.rb')

diff --git a/lib/unicorn/http_request.rb b/lib/unicorn/http_request.rb
new file mode 100644
index 0000000..a76d4e0
--- /dev/null
+++ b/lib/unicorn/http_request.rb
@@ -0,0 +1,106 @@
+
+module Unicorn
+  #
+  # The HttpRequest.initialize method will convert any request that is larger than
+  # Const::MAX_BODY into a Tempfile and use that as the body.  Otherwise it uses 
+  # a StringIO object.  To be safe, you should assume it works like a file.
+  # 
+  class HttpRequest
+    attr_reader :body, :params, :logger
+
+    # You don't really call this.  It's made for you.
+    # Main thing it does is hook up the params, and store any remaining
+    # body data into the HttpRequest.body attribute.
+    def initialize(params, socket, logger)
+      @params = params
+      @socket = socket
+      @logger = logger
+      
+      content_length = @params[Const::CONTENT_LENGTH].to_i
+      remain = content_length - @params[Const::HTTP_BODY].length
+
+      # Some clients (like FF1.0) report 0 for body and then send a body.  This will probably truncate them but at least the request goes through usually.
+      if remain <= 0
+        # we've got everything, pack it up
+        @body = StringIO.new
+        @body.write @params[Const::HTTP_BODY]
+      elsif remain > 0
+        # must read more data to complete body
+        if remain > Const::MAX_BODY
+          # huge body, put it in a tempfile
+          @body = Tempfile.new(Const::UNICORN_TMP_BASE)
+          @body.binmode
+        else
+          # small body, just use that
+          @body = StringIO.new 
+        end
+
+        @body.write @params[Const::HTTP_BODY]
+        read_body(remain, content_length)
+      end
+
+      @body.rewind if @body
+    end
+
+    # Returns an environment which is rackable: http://rack.rubyforge.org/doc/files/SPEC.html
+    # Copied directly from Rack's old Unicorn handler.
+    def env
+      env = params.clone
+      env["QUERY_STRING"] ||= ''
+      env.delete "HTTP_CONTENT_TYPE"
+      env.delete "HTTP_CONTENT_LENGTH"
+      env["SCRIPT_NAME"] = "" if env["SCRIPT_NAME"] == "/"
+      env.update({"rack.version" => [0,1],
+              "rack.input" => @body,
+              "rack.errors" => STDERR,
+
+              "rack.multithread" => true,
+              "rack.multiprocess" => false, # ???
+              "rack.run_once" => false,
+
+              "rack.url_scheme" => "http",
+            }) 
+    end
+
+    # Does the heavy lifting of properly reading the larger body requests in 
+    # small chunks.  It expects @body to be an IO object, @socket to be valid,
+    # and will set @body = nil if the request fails.  It also expects any initial
+    # part of the body that has been read to be in the @body already.
+    def read_body(remain, total)
+      begin
+        # Write the odd sized chunk first
+        @params[Const::HTTP_BODY] = read_socket(remain % Const::CHUNK_SIZE)
+
+        remain -= @body.write(@params[Const::HTTP_BODY])
+
+        # Then stream out nothing but perfectly sized chunks
+        until remain <= 0 or @socket.closed?
+          # ASSUME: we are writing to a disk and these writes always write the requested amount
+          @params[Const::HTTP_BODY] = read_socket(Const::CHUNK_SIZE)
+          remain -= @body.write(@params[Const::HTTP_BODY])
+        end
+      rescue Object => e
+        logger.error "Error reading HTTP body: #{e.inspect}"
+        # Any errors means we should delete the file, including if the file is dumped
+        @socket.close rescue nil
+        @body.close! if @body.class == Tempfile
+        @body = nil # signals that there was a problem
+      end
+    end
+ 
+    def read_socket(len)
+      if !@socket.closed?
+        data = @socket.read(len)
+        if !data
+          raise "Socket read return nil"
+        elsif data.length != len
+          raise "Socket read returned insufficient data: #{data.length}"
+        else
+          data
+        end
+      else
+        raise "Socket already closed when reading."
+      end
+    end
+  end
+end
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