[gnome-shell] environment: Fallback to Soup 2.4

[Marge Bot <marge-bot src gnome org>]

commit d562c70f4efacd2a6cf78ed00b2a987be3a485e3
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Aug 4 19:37:15 2021 +0200

    environment: Fallback to Soup 2.4
    
    We cannot assume yet that Soup3 is available everywhere. Until that
    is the case, allow falling back to Soup 2.4 by imitating the bits
    of the Soup3 API we use with monkey-patching.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1940>

 js/ui/environment.js | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
---
diff --git a/js/ui/environment.js b/js/ui/environment.js
index d3ea54387e..bd372ce26a 100644
--- a/js/ui/environment.js
+++ b/js/ui/environment.js
@@ -11,6 +11,14 @@ imports.gi.versions.Soup = '3.0';
 imports.gi.versions.TelepathyGLib = '0.12';
 imports.gi.versions.TelepathyLogger = '0.2';
 
+try {
+    const Soup_ = imports.gi.Soup;
+} catch (e) {
+    imports.gi.versions.Soup = '2.4';
+    const { Soup } = imports.gi;
+    _injectSoup3Compat(Soup);
+}
+
 const { Clutter, Gio, GLib, GObject, Meta, Polkit, Shell, St } = imports.gi;
 const Gettext = imports.gettext;
 const System = imports.system;
@@ -69,6 +77,44 @@ function _patchLayoutClass(layoutClass, styleProps) {
     }
 }
 
+/**
+ * Mimick the Soup 3 APIs we use when falling back to Soup 2.4
+ *
+ * @param {object} Soup 2.4 namespace
+ * @returns {void}
+ */
+function _injectSoup3Compat(Soup) {
+    const ByteArray = imports.byteArray;
+
+    Soup.StatusCode = Soup.KnownStatusCode;
+
+    Soup.Message.new_from_encoded_form =
+        function (method, uri, form) {
+            const soupUri = new Soup.URI(uri);
+            soupUri.set_query(form);
+            return Soup.Message.new_from_uri(method, soupUri);
+        };
+    Soup.Message.prototype.set_request_body_from_bytes =
+        function (contentType, bytes) {
+            this.set_request(
+                contentType,
+                Soup.MemoryUse.COPY,
+                ByteArray.toString(bytes.get_data()));
+        };
+
+    Soup.Session.prototype.send_and_read_async =
+        function (message, prio, cancellable, callback) {
+            this.queue_message(message, () => callback(this, message));
+        };
+    Soup.Session.prototype.send_and_read_finish =
+        function (message) {
+            if (message.status_code !== Soup.KnownStatusCode.OK)
+                return null;
+
+            return message.response_body.flatten().get_as_bytes();
+        };
+}
+
 function _makeEaseCallback(params, cleanup) {
     let onComplete = params.onComplete;
     delete params.onComplete;