[英]400 Bad Request when sending a http request with Common Lisp usocket
I'm using the following code to grab the url http://brandonhsiao.com/essays.html
: 我正在使用以下代码来获取URL http://brandonhsiao.com/essays.html
:
(defparameter *new-line* '(#\Return #\Newline))
(defun read-url (host port path)
(let ((sock (usocket:socket-connect host port)))
(format (usocket:socket-stream sock) "~A"
(concatenate 'string
"GET " path " HTTP/1.1" *new-line*
"Connection: close" *new-line* *new-line*))
(force-output (usocket:socket-stream sock))
(do ((line
(read-line (usocket:socket-stream sock) nil)
(read-line (usocket:socket-stream sock) nil))
(all ""))
((not line) all)
(setf all (concatenate 'string all line *new-line*)))))
(print (read-url "brandonhsiao.com" 80 "/essays.html"))
This gives me a 400 Bad Request
error, but when I visit http://brandonhsiao.com/essays.html
with Firefox, everything is fine. 这给我一个400 Bad Request
错误,但是当我使用Firefox访问http://brandonhsiao.com/essays.html
时,一切都很好。 What am I doing wrong? 我究竟做错了什么?
It looks like I needed to include the host. 看来我需要包含主机。
(defparameter *new-line* '(#\Return #\Newline))
(defun read-url (host port path)
(let ((sock (usocket:socket-connect host port)))
(format (usocket:socket-stream sock) "~A"
(concatenate 'string
"GET " path " HTTP/1.1" *new-line*
"Host: " host *new-line* *new-line*))
(force-output (usocket:socket-stream sock))
(do ((line
(read-line (usocket:socket-stream sock) nil)
(read-line (usocket:socket-stream sock) nil))
(all ""))
((not line) all)
(setf all (concatenate 'string all line " ")))))
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