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Allow URL argument in setSkullTexture() #213

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Allow URL argument in setSkullTexture() #213

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a67c876
Allow URL argument in setSkullTexture()
EvModder May 18, 2024
f9d224f
Stricter requirements on skin URL
EvModder May 18, 2024
a205bbf
Catch potentially malformed base64
EvModder Jun 4, 2024
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18 changes: 14 additions & 4 deletions src/main/java/eu/decentsoftware/holograms/api/utils/items/SkullUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,8 @@
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.Collection;
import java.util.UUID;
import java.util.function.Function;
Expand Down Expand Up @@ -118,17 +120,25 @@ public static String getTexture(@NonNull ItemStack itemStack) {
* Set the Base64 texture of the given skull ItemStack.
*
* @param itemStack The ItemStack.
* @param texture The new skull texture (Base64).
* @param texture The new skull texture (Base64 or URL).
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It's not really "or URL". It can either be a very specific URL: http://textures.minecraft.net/texture/ or a hexidecimal id? of a texture on the same site. Just mentioning URL can be misleading here.

*/
public static void setSkullTexture(@NonNull ItemStack itemStack, @NonNull String texture) {
try {
ItemMeta meta = itemStack.getItemMeta();
if (meta instanceof SkullMeta) {
GameProfile profile = new GameProfile(UUID.randomUUID(), "");
Property property = new Property("textures", texture);

PropertyMap properties = profile.getProperties();
properties.put("textures", property);
String json = Base64.getDecoder().decode(texture);
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if(!json.contains("\"url\":\"http://textures.minecraft.net/texture/")){
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Put this if inside the try block above. There is no need to put it outside, it just makes it more complicated. If you put it in the try block, you can avoid re-assigning the json variable to "invalid".

// Decoded json does not contain a valid skin URL, so check if the 'texture' argument is a valid URL.
if(texture.startsWith("http://textures.minecraft.net/texture/")); // We are all set.
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I think this check should be done before trying to decode texture as json. You actually don't really need to decode it at all. Just check if texture is a URL, and if it is, do whatever you do here. Otherwise just skip this and don't do anything.

// Check if the texture is a hexidecimal (like the skinfiles on Minecraft's servers)
else if(texture.matches("^[0-9a-fA-F]+$")) texture = "http://textures.minecraft.net/texture/"+texture;
else; // TODO: Texture invalid, print a warning or something?
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I wouldn't log anything. The method is called frequently and we don't want it to spam the console.

json = "{\"textures\":{\"SKIN\":{\"url\":\""+texture+"\"}}}"; // (Stable for all MC versions with custom skins.)
texture = Base64.getEncoder().encodeToString(json.getBytes(StandardCharsets.ISO_8859_1));
}
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After you move the if block into the try block, the entirety of this "texture-modification" logic should be moved into a private method. By moving it out, we simplify this method and make everything easier to read. The private method could be, for example:

private String normalizeTextureURL(String texture) {
    // ...
}

profile.getProperties().put("textures", new Property("textures", texture));

if (SET_PROFILE_METHOD == null && !INITIALIZED) {
try {
Expand Down