skin studio updates, save sync CLOSES #1533

mobile/android/love/src/jni/love/src/common/android.cpp

@@ -378,6 +378,104 @@ bool httpPost(const char *url, const char *body, int bodyLen, const char *conten
 	return result;
 }
 
+bool httpRequest(const char *url, const char *method,
+	const char *const *headerPairs, int headerPairCount,
+	const char *body, int bodyLen, const char *userAgent, std::string &out)
+{
+	out.clear();
+	if (url == nullptr)
+		return false;
+	if (headerPairCount < 0 || (headerPairCount > 0 && headerPairs == nullptr))
+		return false;
+
+	JNIEnv *env = (JNIEnv*) SDL_AndroidGetJNIEnv();
+	// Same resolution rule as httpDownload: the activity's own class via
+	// SDL_AndroidGetActivity, never FindClass for an app class -- save sync
+	// runs on a love.thread worker, whose class loader cannot see them.
+	jobject activityObj = (jobject) SDL_AndroidGetActivity();
+	if (activityObj == nullptr)
+		return false;
+	jclass activity = env->GetObjectClass(activityObj);
+	env->DeleteLocalRef(activityObj);
+
+	// Old APK / new liblove skew: report "no transport" instead of aborting
+	// on a missing method (#597).
+	jmethodID method_id = env->GetStaticMethodID(activity, "httpRequest",
+		"(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;[BLjava/lang/String;)[B");
+	if (method_id == nullptr)
+	{
+		env->ExceptionClear();
+		env->DeleteLocalRef(activity);
+		return false;
+	}
+
+	jobjectArray jheaders = nullptr;
+	if (headerPairCount > 0)
+	{
+		// java/lang/String, unlike an app class, resolves from any thread.
+		jclass stringClass = env->FindClass("java/lang/String");
+		if (stringClass == nullptr)
+		{
+			env->ExceptionClear();
+			env->DeleteLocalRef(activity);
+			return false;
+		}
+		jheaders = env->NewObjectArray((jsize) headerPairCount, stringClass, nullptr);
+		env->DeleteLocalRef(stringClass);
+		if (jheaders == nullptr)
+		{
+			env->ExceptionClear();
+			env->DeleteLocalRef(activity);
+			return false;
+		}
+		for (int i = 0; i < headerPairCount; i++)
+		{
+			jstring field = env->NewStringUTF(headerPairs[i] != nullptr ? headerPairs[i] : "");
+			env->SetObjectArrayElement(jheaders, (jsize) i, field);
+			if (field != nullptr)
+				env->DeleteLocalRef(field);
+		}
+	}
+
+	jstring jurl = env->NewStringUTF(url);
+	jstring jmethod = env->NewStringUTF(method != nullptr ? method : "GET");
+	// raw bytes across the bridge, as httpPost does: a request body is JSON
+	// carrying a base64 save, and a jstring would run it through modified UTF-8
+	jbyteArray jbody = nullptr;
+	if (body != nullptr && bodyLen >= 0)
+	{
+		jbody = env->NewByteArray((jsize) bodyLen);
+		if (jbody != nullptr && bodyLen > 0)
+			env->SetByteArrayRegion(jbody, 0, (jsize) bodyLen, (const jbyte*) body);
+	}
+	jstring jua = env->NewStringUTF(userAgent != nullptr ? userAgent : "gen1recomp");
+
+	jobject result = env->CallStaticObjectMethod(activity, method_id, jurl, jmethod,
+		jheaders, jbody, jua);
+
+	env->DeleteLocalRef(jurl);
+	env->DeleteLocalRef(jmethod);
+	if (jheaders != nullptr)
+		env->DeleteLocalRef(jheaders);
+	if (jbody != nullptr)
+		env->DeleteLocalRef(jbody);
+	env->DeleteLocalRef(jua);
+	env->DeleteLocalRef(activity);
+
+	if (result == nullptr)
+		return false;
+
+	jbyteArray bytes = (jbyteArray) result;
+	jsize length = env->GetArrayLength(bytes);
+	if (length > 0)
+	{
+		out.resize((size_t) length);
+		env->GetByteArrayRegion(bytes, 0, length, (jbyte*) &out[0]);
+	}
+	env->DeleteLocalRef(result);
+	return true;
+}
+
 /*
  * TLS sockets. Same resolution rule as httpDownload above -- the activity's
  * own class, never FindClass -- and the same tolerance for an old APK: a

mobile/android/love/src/jni/love/src/common/android.h

@@ -106,6 +106,21 @@ bool httpDownload(const char *url, const char *destPath, const char *userAgent,
  **/
 bool httpPost(const char *url, const char *body, int bodyLen, const char *contentType, const char *userAgent);
 
+/**
+ * Blocking HTTPS request with a method, headers and a byte body
+ * (GameActivity.httpRequest). What save sync needs and neither of the two
+ * above can give it: PUT, per-request auth headers, and the response body of
+ * a 4xx as well as a 2xx. headerPairs is a flat name, value array of
+ * headerPairCount entries; body/userAgent may be null. `out` receives the
+ * Java side's envelope -- a head line of "STATUS <code>" or "ERROR <text>",
+ * a newline, then the raw response bytes. False means the platform has no
+ * such bridge at all (an old APK under a newer liblove), which the Lua side
+ * reports as "update the app" rather than as a failed request.
+ **/
+bool httpRequest(const char *url, const char *method,
+	const char *const *headerPairs, int headerPairCount,
+	const char *body, int bodyLen, const char *userAgent, std::string &out);
+
 /**
  * TLS client sockets (GameActivity.tls*, implemented by TlsSocket.java).
  * LuaSocket, which is what LOVE ships, does TCP only, so wss:// is otherwise

mobile/android/love/src/jni/love/src/modules/system/System.cpp

@@ -274,6 +274,27 @@ bool System::httpPost(const char *url, const char *body, int bodyLen,
 #endif
 }
 
+bool System::httpRequest(const char *url, const char *method,
+	const char *const *headerPairs, int headerPairCount,
+	const char *body, int bodyLen, const char *userAgent,
+	std::string &out) const
+{
+#ifdef LOVE_ANDROID
+	return love::android::httpRequest(url, method, headerPairs, headerPairCount,
+		body, bodyLen, userAgent, out);
+#else
+	LOVE_UNUSED(url);
+	LOVE_UNUSED(method);
+	LOVE_UNUSED(headerPairs);
+	LOVE_UNUSED(headerPairCount);
+	LOVE_UNUSED(body);
+	LOVE_UNUSED(bodyLen);
+	LOVE_UNUSED(userAgent);
+	out.clear();
+	return false;
+#endif
+}
+
 int System::tlsOpen(const char *host, int port) const
 {
 #ifdef LOVE_ANDROID

mobile/android/love/src/jni/love/src/modules/system/System.h

@@ -159,6 +159,18 @@ public:
 	virtual bool httpPost(const char *url, const char *body, int bodyLen,
 		const char *contentType = nullptr, const char *userAgent = nullptr) const;
 
+	/**
+	 * Blocking HTTPS request with a method, headers and a byte body (Android
+	 * only; false elsewhere). Save sync needs PUT, auth headers and the body
+	 * of a 4xx, none of which the two bridges above can express. headerPairs
+	 * is a flat name, value array; `out` receives the response envelope
+	 * ("STATUS <code>" or "ERROR <text>", a newline, then the raw body).
+	 **/
+	virtual bool httpRequest(const char *url, const char *method,
+		const char *const *headerPairs, int headerPairCount,
+		const char *body, int bodyLen, const char *userAgent,
+		std::string &out) const;
+
 	/**
 	 * TLS client sockets (Android only; every call fails elsewhere, where
 	 * LuaSec or another provider is the answer). Non-blocking by contract:

mobile/android/love/src/jni/love/src/modules/system/wrap_System.cpp

@@ -22,6 +22,9 @@
 #include "wrap_System.h"
 #include "sdl/System.h"
 
+#include <string>
+#include <vector>
+
 namespace love
 {
 namespace system
@@ -150,6 +153,57 @@ int w_httpPost(lua_State *L)
 	return 1;
 }
 
+/*
+ * love.system.httpRequest(url, method, headers, body, userAgent) -> envelope
+ *
+ * `headers` is a flat array of alternating header name and value strings, so
+ * it maps straight onto the Java bridge's String[] without any parsing here.
+ * The single return is the response envelope -- a head line of
+ * "STATUS <code>" or "ERROR <text>", a newline, then the raw body -- or nil
+ * where the build has no bridge, which src/core/HostShell.lua turns into an
+ * "update the app" notice rather than a failed request.
+ */
+int w_httpRequest(lua_State *L)
+{
+	const char *url = luaL_checkstring(L, 1);
+	const char *method = luaL_optstring(L, 2, "GET");
+
+	std::vector<std::string> fields;
+	if (!lua_isnoneornil(L, 3))
+	{
+		luaL_checktype(L, 3, LUA_TTABLE);
+		size_t count = luax_objlen(L, 3);
+		for (size_t i = 1; i <= count; i++)
+		{
+			lua_rawgeti(L, 3, (int) i);
+			const char *field = lua_tostring(L, -1);
+			fields.push_back(field != nullptr ? field : "");
+			lua_pop(L, 1);
+		}
+	}
+	std::vector<const char *> pairs;
+	for (size_t i = 0; i < fields.size(); i++)
+		pairs.push_back(fields[i].c_str());
+
+	size_t bodyLen = 0;
+	const char *body = nullptr;
+	if (!lua_isnoneornil(L, 4))
+		body = luaL_checklstring(L, 4, &bodyLen);
+	const char *ua = luaL_optstring(L, 5, nullptr);
+
+	std::string out;
+	bool ok = instance()->httpRequest(url, method,
+		pairs.empty() ? nullptr : &pairs[0], (int) pairs.size(),
+		body, (int) bodyLen, ua, out);
+	if (!ok)
+	{
+		lua_pushnil(L);
+		return 1;
+	}
+	lua_pushlstring(L, out.data(), out.size());
+	return 1;
+}
+
 int w_hasBackgroundMusic(lua_State *L)
 {
 	lua_pushboolean(L, instance()->hasBackgroundMusic());
@@ -245,6 +299,7 @@ static const luaL_Reg functions[] =
 	{ "restartApp", w_restartApp },
 	{ "httpDownload", w_httpDownload },
 	{ "httpPost", w_httpPost },
+	{ "httpRequest", w_httpRequest },
 	{ "tlsOpen", w_tlsOpen },
 	{ "tlsStatus", w_tlsStatus },
 	{ "tlsSend", w_tlsSend },