Revert: Remove deprecated code

src/hdskins/java/com/voxelmodpack/hdskins/skins/LegacySkinServer.java

@@ -9,6 +9,8 @@ import com.mojang.authlib.minecraft.MinecraftProfileTexture;
 import com.mojang.authlib.yggdrasil.response.MinecraftTexturesPayload;
 import com.mojang.util.UUIDTypeAdapter;
 import com.voxelmodpack.hdskins.HDSkinManager;
+import com.voxelmodpack.hdskins.upload.ThreadMultipartPostUpload;
+
 import net.minecraft.util.Session;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -91,15 +93,7 @@ public class LegacySkinServer implements SkinServer {
         return CallableFutures.asyncFailableFuture(() -> {
             SkinServer.verifyServerConnection(session, SERVER_ID);
 
-            NetClient client = new NetClient("POST", gateway);
-
-            client.putHeaders(createHeaders(session, upload));
-
-            if (upload.getImage() != null) {
-                client.putFile(upload.getType().toString().toLowerCase(Locale.US), "image/png", upload.getImage());
-            }
-
-            String response = client.send().text();
+            String response = new ThreadMultipartPostUpload(gateway, createHeaders(session, upload)).uploadMultipart();
 
             if (response.startsWith("ERROR: ")) {
                 response = response.substring(7);
@@ -120,12 +114,13 @@ public class LegacySkinServer implements SkinServer {
         Builder<String, Object> builder = ImmutableMap.<String, Object>builder()
                 .put("user", session.getUsername())
                 .put("uuid", UUIDTypeAdapter.fromUUID(session.getProfile().getId()))
-                .put("type", upload.getType().toString().toLowerCase(Locale.US));
+                .put("type", upload.getType().toString().toLowerCase(Locale.US))
+                .put("model", upload.getMetadata().getOrDefault("model", "default"));
 
         if (upload.getImage() == null) {
             builder.put("clear", "1");
         } else {
-            builder.put("model", upload.getMetadata().getOrDefault("mode", "default"));
+            builder.put(upload.getType().toString().toLowerCase(Locale.US), upload.getImage());
         }
 
         return builder.build();

src/hdskins/java/com/voxelmodpack/hdskins/upload/ThreadMultipartPostUpload.java

@@ -0,0 +1,111 @@
+package com.voxelmodpack.hdskins.upload;
+
+import org.apache.commons.io.IOUtils;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URI;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import javax.annotation.Nullable;
+
+/**
+ * Uploader for Multipart form data
+ *
+ * @author Adam Mummery-Smith
+ * @deprecated Use httpmime multipart upload
+ */
+@Deprecated
+public class ThreadMultipartPostUpload {
+    protected final Map<String, ?> sourceData;
+
+    protected final String method;
+
+    protected final String authorization;
+
+    protected final String urlString;
+
+    protected HttpURLConnection httpClient;
+
+    protected static final String CRLF = "\r\n";
+
+    protected static final String twoHyphens = "--";
+
+    protected static final String boundary = "----------AaB03x";
+
+    public String response;
+
+    public ThreadMultipartPostUpload(String method, String url, Map<String, ?> sourceData, @Nullable String authorization) {
+        this.method = method;
+        this.urlString = url;
+        this.sourceData = sourceData;
+        this.authorization = authorization;
+    }
+
+    public ThreadMultipartPostUpload(String url, Map<String, ?> sourceData) {
+        this("POST", url, sourceData, null);
+    }
+
+    public String uploadMultipart() throws IOException {
+        // open a URL connection
+        URL url = new URL(this.urlString);
+
+        // Open a HTTP connection to the URL
+        this.httpClient = (HttpURLConnection) url.openConnection();
+        this.httpClient.setDoOutput(true);
+        this.httpClient.setUseCaches(false);
+
+        this.httpClient.setRequestMethod(this.method);
+        this.httpClient.setRequestProperty("Connection", "Close");
+        this.httpClient.addRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"); // For CloudFlare
+
+        if (this.sourceData.size() > 0) {
+            this.httpClient.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
+        }
+
+        if (this.authorization != null) {
+            this.httpClient.addRequestProperty("Authorization", this.authorization);
+        }
+
+        try (DataOutputStream outputStream = new DataOutputStream(this.httpClient.getOutputStream())) {
+
+            for (Entry<String, ?> data : this.sourceData.entrySet()) {
+                outputStream.writeBytes(twoHyphens + boundary + CRLF);
+
+                String paramName = data.getKey();
+                Object paramData = data.getValue();
+
+                if (paramData instanceof URI) {
+                    Path uploadPath = Paths.get((URI) paramData);
+
+                    outputStream.writeBytes("Content-Disposition: form-data; name=\"" + paramName + "\"; filename=\"" + uploadPath.getFileName() + "\"" + CRLF);
+                    outputStream.writeBytes("Content-Type: image/png" + CRLF + CRLF);
+
+
+                    Files.copy(uploadPath, outputStream);
+                } else {
+                    outputStream.writeBytes("Content-Disposition: form-data; name=\"" + paramName + "\"" + CRLF + CRLF);
+
+                    outputStream.writeBytes(paramData.toString());
+                }
+
+                outputStream.writeBytes(ThreadMultipartPostUpload.CRLF);
+            }
+
+            outputStream.writeBytes(twoHyphens + boundary + twoHyphens + CRLF);
+        }
+
+        try (InputStream input = this.httpClient.getInputStream()) {
+            return IOUtils.toString(input, StandardCharsets.UTF_8);
+        }
+    }
+
+}