Emacs 25.1 error solved: url-http-create-request: Multibyte text in HTTP request
After update to 25.1, I found that I can't use url-http to request any more. Then I googled for hours, but not found a good solution. So I update the emacs source code from github, and build a latest w64 version 26.0.50, but the error is still existed.
Today, I decide to spend some time to read the code. Then I find this in file:
c:/emacs/share/emacs/26.0.50/lisp/url/url-http.el.gz
line: 395
;; Bug#23750 (unless (= (string-bytes request) (length request)) (error "Multibyte text in HTTP request: %s" request))
The error occurs when our content contains multibyte, then (string-bytes request) is not equal to (length request) .
And I checked the comment (;; Bug#23750) above, which leads a bug to json-mode. So simple delete this code can solve our problem, but that can lead to Bug#23750 again. So we should make sure that our request data get encoded. A simple way is to modified the code as follows:
;; Bug#23750 (setq request (url-http--encode-string request)) (unless (= (string-bytes request) (length request)) (error "Multibyte text in HTTP request: %s" request))
The whole function:
(defun url-http-create-request (&optional ref-url) "Create an HTTP request for `url-http-target-url', referred to by REF-URL." (let* ((extra-headers) (request nil) (no-cache (cdr-safe (assoc "Pragma" url-http-extra-headers))) (using-proxy url-http-proxy) (proxy-auth (if (or (cdr-safe (assoc "Proxy-Authorization" url-http-extra-headers)) (not using-proxy)) nil (let ((url-basic-auth-storage 'url-http-proxy-basic-auth-storage)) (url-get-authentication url-http-proxy nil 'any nil)))) (real-fname (url-filename url-http-target-url)) (host (url-http--encode-string (url-host url-http-target-url))) (auth (if (cdr-safe (assoc "Authorization" url-http-extra-headers)) nil (url-get-authentication (or (and (boundp 'proxy-info) proxy-info) url-http-target-url) nil 'any nil)))) (if (equal "" real-fname) (setq real-fname "/")) (setq no-cache (and no-cache (string-match "no-cache" no-cache))) (if auth (setq auth (concat "Authorization: " auth " "))) (if proxy-auth (setq proxy-auth (concat "Proxy-Authorization: " proxy-auth " "))) ;; Protection against stupid values in the referrer (if (and ref-url (stringp ref-url) (or (string= ref-url "file:nil") (string= ref-url ""))) (setq ref-url nil)) ;; We do not want to expose the referrer if the user is paranoid. (if (or (memq url-privacy-level '(low high paranoid)) (and (listp url-privacy-level) (memq 'lastloc url-privacy-level))) (setq ref-url nil)) ;; url-http-extra-headers contains an assoc-list of ;; header/value pairs that we need to put into the request. (setq extra-headers (mapconcat (lambda (x) (concat (car x) ": " (cdr x))) url-http-extra-headers " ")) (if (not (equal extra-headers "")) (setq extra-headers (concat extra-headers " "))) ;; This was done with a call to `format'. Concatenating parts has ;; the advantage of keeping the parts of each header together and ;; allows us to elide null lines directly, at the cost of making ;; the layout less clear. (setq request (concat ;; The request (or url-http-method "GET") " " (url-http--encode-string (if using-proxy (url-recreate-url url-http-target-url) real-fname)) " HTTP/" url-http-version " " ;; Version of MIME we speak "MIME-Version: 1.0 " ;; (maybe) Try to keep the connection open "Connection: " (if (or using-proxy (not url-http-attempt-keepalives)) "close" "keep-alive") " " ;; HTTP extensions we support (if url-extensions-header (format "Extension: %s " url-extensions-header)) ;; Who we want to talk to (if (/= (url-port url-http-target-url) (url-scheme-get-property (url-type url-http-target-url) 'default-port)) (format "Host: %s:%d " (puny-encode-domain host) (url-port url-http-target-url)) (format "Host: %s " (puny-encode-domain host))) ;; Who its from (if url-personal-mail-address (concat "From: " url-personal-mail-address " ")) ;; Encodings we understand (if (or url-mime-encoding-string ;; MS-Windows loads zlib dynamically, so recheck ;; in case they made it available since ;; initialization in url-vars.el. (and (eq 'system-type 'windows-nt) (fboundp 'zlib-available-p) (zlib-available-p) (setq url-mime-encoding-string "gzip"))) (concat "Accept-encoding: " url-mime-encoding-string " ")) (if url-mime-charset-string (concat "Accept-charset: " (url-http--encode-string url-mime-charset-string) " ")) ;; Languages we understand (if url-mime-language-string (concat "Accept-language: " url-mime-language-string " ")) ;; Types we understand "Accept: " (or url-mime-accept-string "*/*") " " ;; User agent (url-http-user-agent-string) ;; Proxy Authorization proxy-auth ;; Authorization auth ;; Cookies (when (url-use-cookies url-http-target-url) (url-http--encode-string (url-cookie-generate-header-lines host real-fname (equal "https" (url-type url-http-target-url))))) ;; If-modified-since (if (and (not no-cache) (member url-http-method '("GET" nil))) (let ((tm (url-is-cached url-http-target-url))) (if tm (concat "If-modified-since: " (url-get-normalized-date tm) " ")))) ;; Whence we came (if ref-url (concat "Referer: " ref-url " ")) extra-headers ;; Length of data (if url-http-data (concat "Content-length: " (number-to-string (length url-http-data)) " ")) ;; End request " " ;; Any data url-http-data)) ;; Bug#23750 (setq request (url-http--encode-string request)) (unless (= (string-bytes request) (length request)) (error "Multibyte text in HTTP request: %s" request)) (url-http-debug "Request is: %s" request) request))
Add this to the configuration file. Then we can request multibyte content like Chinese and Japanese.
This is my Emacs configuration package (contains a Cnblogs package to write cnblogs blogs, download from cnblogs, and fix some bugs):