Added possibility to change image uploader's form body with Enviroment Variables (#1709)

docs/ENV.md

@@ -30,6 +30,10 @@ Notes:
  - If you want to host the images yourself. You need [Nuuls' filehost software](https://github.com/nuuls/filehost)
  - Other image hosting software is currently not supported.
 
+### CHATTERINO2_IMAGE_UPLOADER_FORM_BODY
+Used to change the name of an image form field in a request to the URL that Chatterino2 uses when trying to paste an image into chat. This can be used when your image uploading software accepts a different form field than default value.  
+Default value: `attachment`
+
 ### CHATTERINO2_TWITCH_SERVER_HOST
 String value used to change what Twitch chat server host to connect to.  
 Default value: `irc.chat.twitch.tv`

src/common/Env.cpp

@@ -59,6 +59,8 @@ Env::Env()
           "https://braize.pajlada.com/chatterino/twitchemotes/set/%1/"))
     , imageUploaderUrl(readStringEnv("CHATTERINO2_IMAGE_UPLOADER_URL",
                                      "https://i.nuuls.com/upload"))
+    , imageUploaderFormBody(
+          readStringEnv("CHATTERINO2_IMAGE_UPLOADER_FORM_BODY", "attachment"))
     , twitchServerHost(
           readStringEnv("CHATTERINO2_TWITCH_SERVER_HOST", "irc.chat.twitch.tv"))
     , twitchServerPort(readPortEnv("CHATTERINO2_TWITCH_SERVER_PORT", 443))

src/common/Env.hpp

@@ -15,6 +15,7 @@ public:
     const QString linkResolverUrl;
     const QString twitchEmoteSetResolverUrl;
     const QString imageUploaderUrl;
+    const QString imageUploaderFormBody;
     const QString twitchServerHost;
     const uint16_t twitchServerPort;
     const bool twitchServerSecure;

src/util/NuulsUploader.cpp

@@ -43,6 +43,7 @@ void uploadImageToNuuls(RawImageData imageData, ChannelPtr channel,
     const static QString contentType =
         QString("multipart/form-data; boundary=%1").arg(boundary);
     static QUrl url(Env::get().imageUploaderUrl);
+    static QString formBody(Env::get().imageUploaderFormBody);
 
     QHttpMultiPart *payload = new QHttpMultiPart(QHttpMultiPart::FormDataType);
     QHttpPart part = QHttpPart();
@@ -51,9 +52,9 @@ void uploadImageToNuuls(RawImageData imageData, ChannelPtr channel,
                    QString("image/%1").arg(imageData.format));
     part.setHeader(QNetworkRequest::ContentLengthHeader,
                    QVariant(imageData.data.length()));
-    part.setHeader(
+    part.setHeader(QNetworkRequest::ContentDispositionHeader,
-        QNetworkRequest::ContentDispositionHeader,
+                   QString("form-data; name=\"%1\"; filename=\"control_v.%2\"")
-        QString("form-data; name=\"attachment\"; filename=\"control_v.%1\"")
+                       .arg(formBody)
                        .arg(imageData.format));
     payload->setBoundary(boundary);
     payload->append(part);