From 393e59ffece0d799c40b27d10c459a194cc69f14 Mon Sep 17 00:00:00 2001
From: Timo Wilken
Date: Sat, 23 Mar 2024 17:32:59 -0500
Subject: Fix timezone-setting script

It seems ipapi.co now requires a User-Agent header, else requests immediately
get rate limited.

Also improve error handling, and use streaming mode to fix mystery errors, as
`http-get' choked on a bytevector response where it expected a string.
---
 tw/system.scm | 40 +++++++++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 17 deletions(-)

diff --git a/tw/system.scm b/tw/system.scm
index 34f398a8..e62ad095 100644
--- a/tw/system.scm
+++ b/tw/system.scm
@@ -125,33 +125,39 @@
   (with-extensions (list guile-json-4 guile-gnutls)  ; guile-gnutls needed by (web client)
     #~(begin
         (use-modules ((srfi srfi-11) #:select (let-values))
+                     ((ice-9 textual-ports) #:select (get-string-all))
+                     (ice-9 format)
                      (json)
                      (web client)
                      (web response))
         (define api-url "https://ipapi.co/json")
+        (define headers '((user-agent . "tw-dotfiles/0.0 (abuse@twilken.net)")))
         ;; According to the Arch Wiki, when checking for "up" as the second
         ;; argument, VPN connections could cause undesired timezone changes.
         (when (and (string=? "connectivity-change" (caddr (command-line)))
                    (string=? "FULL" (getenv "CONNECTIVITY_STATE")))
-          (let-values (((response text) (http-get api-url)))
+          (let-values (((response body-port) (http-get api-url #:headers headers #:streaming? #t)))
             (unless (= 200 (response-code response))
-              (error "Got error response to request:" response))
-            (let* ((json (json-string->scm text))
-                   (timezone (assoc-ref json "timezone"))
-                   (zonefile (string-append #$tzdata "/share/zoneinfo/" timezone))
-                   (regdb-country (assoc-ref json "country_code"))
-                   (error-code
-                    (status:exit-val
-                     ;; Set WiFi regulatory domain to use the correct channels.
-                     (system* #$(file-append iw "/bin/iw") "reg" "set" regdb-country))))
-              (format (current-error-port) "Updated WiFi regdomain to ~a: ~a~%"
-                      regdb-country (if (zero? error-code) "success"
-                                        (format #f "error ~d" error-code)))
+              (error "Got error response to request:"
+                     (response-code response) (get-string-all body-port)))
+            (let ((json (json->scm body-port)))
+              (when (assoc-ref json "error")
+                (error "Got error response to request:"
+                       (assoc-ref json "reason") (assoc-ref json "message")))
+              ;; Set WiFi regulatory domain to use the correct channels.
+              (let* ((regdb-country (assoc-ref json "country_code"))
+                     (error-code
+                      (system* #$(file-append iw "/sbin/iw") "reg" "set" regdb-country)))
+                (format (current-error-port) "Updated WiFi regdomain to ~a: ~a~%"
+                        regdb-country (if (status:exit-val error-code) "success"
+                                          (format #f "error ~d" error-code))))
               ;; Set local timezone.
-              (delete-file "/etc/localtime")
-              (symlink zonefile "/etc/localtime")
-              (format (current-error-port)
-                      "Updated timezone to ~a: success~%" timezone)))))))
+              (let* ((timezone (assoc-ref json "timezone"))
+                     (zonefile (string-append #$tzdata "/share/zoneinfo/" timezone)))
+                (delete-file "/etc/localtime")
+                (symlink zonefile "/etc/localtime")
+                (format (current-error-port)
+                        "Updated timezone to ~a: success~%" timezone))))))))
 
 ;; This text is added verbatim to the Xorg config file.
 (define touchpad-xorg-config "\
-- 
cgit v1.2.3