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fix: replace PREFIX_FULL_URL with API_PREFIX for cache-121.199.60.4 mirror #3

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fix: replace PREFIX_FULL_URL with API_PREFIX for cache-121.199.60.4 mirror #3

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28 changes: 24 additions & 4 deletions XenonCore/src/main/java/determination/xenon/mindustry/download/MirrorSelector.java
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Original file line number Diff line number Diff line change
Expand Up @@ -70,9 +70,13 @@ public final class MirrorSelector {
* mirror penalty.
*/
private static final List<Mirror> CANDIDATES = List.of(
// Domestic cache proxy for Chinese users — faster than direct GitHub access
// Domestic API cache proxy. Only handles GitHub API paths
// (/github/repos/...), not raw.githubusercontent.com or
// github.com pages. PREFIX_FULL_URL would produce
// /github/https://raw.githubusercontent.com/... which the
// server cannot serve → HTTP 403.
new Mirror("cache-121.199.60.4",
"http://121.199.60.4/github/", Strategy.PREFIX_FULL_URL, "http://121.199.60.4/github/"),
"http://121.199.60.4/github/", Strategy.API_PREFIX, "http://121.199.60.4/github/"),
// gh.tinylake.top first — TinyLake's own proxy, the same one
// mindustry.top/download links to. Empirically the most
// reliable mirror for users in mainland China.
Expand Down Expand Up @@ -252,7 +256,17 @@ private enum Strategy {
* Substitute {@code github.com} with the mirror host
* (and {@code raw.githubusercontent.com} with {@code raw.<host>/}).
*/
HOST_REPLACE
HOST_REPLACE,
/**
* Rewrite only {@code api.github.com} URLs by stripping the API
* host and prepending {@code prefix} + {@code repos/...}.
* Other GitHub origins (raw, github.com, codeload) are passed
* through unchanged — this mirror cannot serve them.
*
* <p>Designed for cache proxies that speak the GitHub API v3
* protocol but cannot proxy raw file downloads.</p>
*/
API_PREFIX
}

private static final class Mirror {
Expand Down Expand Up @@ -286,6 +300,12 @@ String wrap(String url) {
}
// api.github.com / codeload not handled by host-replace mirrors
return url;
case API_PREFIX:
if (url.startsWith(API)) {
return prefix + url.substring(API.length());
}
// raw / github.com / codeload URLs cannot go through this proxy
return url;
default:
return url;
}
Expand All @@ -305,4 +325,4 @@ public List<String> candidateNames() {
for (Mirror m : CANDIDATES) names.add(m.name);
return Collections.unmodifiableList(names);
}
}
}
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