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AndroidClient.cpp
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227 lines (175 loc) · 6.33 KB
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#include "AndroidClient.h"
#ifdef HTTPS_BACKEND_ANDROID
#include <sstream>
#include <type_traits>
#include "../common/LibraryLoader.h"
// We want std::string that contains null byte, hence length of 1.
// NOLINTNEXTLINE
static std::string null("", 1);
static std::string replace(const std::string &str, const std::string &from, const std::string &to)
{
std::stringstream ss;
size_t oldpos = 0;
while (true)
{
size_t pos = str.find(from, oldpos);
if (pos == std::string::npos)
{
ss << str.substr(oldpos);
break;
}
ss << str.substr(oldpos, pos - oldpos) << to;
oldpos = pos + from.length();
}
return ss.str();
}
static jstring newStringUTF(JNIEnv *env, const std::string &str)
{
std::string newStr = replace(str, null, "\xC0\x80");
jstring jstr = env->NewStringUTF(newStr.c_str());
return jstr;
}
static std::string getStringUTF(JNIEnv *env, jstring str)
{
const char *c = env->GetStringUTFChars(str, nullptr);
std::string result = replace(c, "\xC0\x80", null);
env->ReleaseStringUTFChars(str, c);
return result;
}
AndroidClient::AndroidClient()
: HTTPSClient()
{
LibraryLoader::handle *library = LibraryLoader::GetCurrentProcessHandle();
// Look for SDL_GetAndroidJNIEnv and SDL_GetAndroidActivity (SDL3)
if (!(
LibraryLoader::LoadSymbol(SDL_AndroidGetJNIEnv, library, "SDL_GetAndroidJNIEnv") &&
LibraryLoader::LoadSymbol(SDL_AndroidGetActivity, library, "SDL_GetAndroidActivity")
))
{
// Probably running SDL2.
LibraryLoader::LoadSymbol(SDL_AndroidGetJNIEnv, library, "SDL_AndroidGetJNIEnv");
LibraryLoader::LoadSymbol(SDL_AndroidGetActivity, library, "SDL_AndroidGetActivity");
}
}
bool AndroidClient::valid() const
{
if (SDL_AndroidGetJNIEnv && SDL_AndroidGetActivity)
{
JNIEnv *env = SDL_AndroidGetJNIEnv();
if (env)
{
jclass httpsClass = getHTTPSClass();
if (env->ExceptionCheck())
{
env->ExceptionClear();
return false;
}
env->DeleteLocalRef(httpsClass);
return true;
}
}
return false;
}
HTTPSClient::Reply AndroidClient::request(const HTTPSClient::Request &req)
{
JNIEnv *env = SDL_AndroidGetJNIEnv();
jclass httpsClass = getHTTPSClass();
if (httpsClass == nullptr)
{
env->ExceptionClear();
throw std::runtime_error("Could not find class 'org.love2d.luahttps.LuaHTTPS'");
}
jmethodID constructor = env->GetMethodID(httpsClass, "<init>", "()V");
jmethodID setURL = env->GetMethodID(httpsClass, "setUrl", "(Ljava/lang/String;)V");
jmethodID setMethod = env->GetMethodID(httpsClass, "setMethod", "(Ljava/lang/String;)V");
jmethodID request = env->GetMethodID(httpsClass, "request", "()Z");
jmethodID getInterleavedHeaders = env->GetMethodID(httpsClass, "getInterleavedHeaders", "()[Ljava/lang/String;");
jmethodID getResponse = env->GetMethodID(httpsClass, "getResponse", "()[B");
jmethodID getResponseCode = env->GetMethodID(httpsClass, "getResponseCode", "()I");
jobject httpsObject = env->NewObject(httpsClass, constructor);
// Set URL
jstring url = env->NewStringUTF(req.url.c_str());
env->CallVoidMethod(httpsObject, setURL, url);
env->DeleteLocalRef(url);
// Set method
jstring method = env->NewStringUTF(req.method.c_str());
env->CallVoidMethod(httpsObject, setMethod, method);
env->DeleteLocalRef(method);
// Set post data
if (!req.postdata.empty())
{
jmethodID setPostData = env->GetMethodID(httpsClass, "setPostData", "([B)V");
jbyteArray byteArray = env->NewByteArray((jsize) req.postdata.length());
jbyte *byteArrayData = env->GetByteArrayElements(byteArray, nullptr);
// The usage of memcpy is intentional.
// NOLINTNEXTLINE
memcpy(byteArrayData, req.postdata.data(), req.postdata.length());
env->ReleaseByteArrayElements(byteArray, byteArrayData, 0);
env->CallVoidMethod(httpsObject, setPostData, byteArray);
env->DeleteLocalRef(byteArray);
}
// Set headers
if (!req.headers.empty())
{
jmethodID addHeader = env->GetMethodID(httpsClass, "addHeader", "(Ljava/lang/String;Ljava/lang/String;)V");
for (auto &header : req.headers)
{
jstring headerKey = newStringUTF(env, header.first);
jstring headerValue = newStringUTF(env, header.second);
env->CallVoidMethod(httpsObject, addHeader, headerKey, headerValue);
env->DeleteLocalRef(headerKey);
env->DeleteLocalRef(headerValue);
}
}
// Do request
HTTPSClient::Reply response;
jboolean status = env->CallBooleanMethod(httpsObject, request);
// Get response
response.responseCode = env->CallIntMethod(httpsObject, getResponseCode);
if (status)
{
// Get headers
jobjectArray interleavedHeaders = (jobjectArray) env->CallObjectMethod(httpsObject, getInterleavedHeaders);
int headerLen = env->GetArrayLength(interleavedHeaders);
for (int i = 0; i < headerLen; i += 2)
{
jstring key = (jstring) env->GetObjectArrayElement(interleavedHeaders, i);
jstring value = (jstring) env->GetObjectArrayElement(interleavedHeaders, i + 1);
response.headers[getStringUTF(env, key)] = getStringUTF(env, value);
env->DeleteLocalRef(key);
env->DeleteLocalRef(value);
}
env->DeleteLocalRef(interleavedHeaders);
// Get response data
jbyteArray responseData = (jbyteArray) env->CallObjectMethod(httpsObject, getResponse);
if (responseData)
{
int responseLen = env->GetArrayLength(responseData);
jbyte *responseByte = env->GetByteArrayElements(responseData, nullptr);
response.body = std::string((char *) responseByte, responseLen);
env->DeleteLocalRef(responseData);
}
}
env->DeleteLocalRef(httpsObject);
return response;
}
jclass AndroidClient::getHTTPSClass() const
{
JNIEnv *env = SDL_AndroidGetJNIEnv();
jclass classLoaderClass = env->FindClass("java/lang/ClassLoader");
jmethodID loadClass = env->GetMethodID(classLoaderClass, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
jobject activity = SDL_AndroidGetActivity();
if (activity == nullptr)
return nullptr;
jclass gameActivity = env->GetObjectClass(activity);
jmethodID getLoader = env->GetMethodID(gameActivity, "getClassLoader", "()Ljava/lang/ClassLoader;");
jobject classLoader = env->CallObjectMethod(activity, getLoader);
jstring httpsClassName = env->NewStringUTF("org.love2d.luahttps.LuaHTTPS");
jclass httpsClass = (jclass) env->CallObjectMethod(classLoader, loadClass, httpsClassName);
env->DeleteLocalRef(gameActivity);
env->DeleteLocalRef(httpsClassName);
env->DeleteLocalRef(activity);
env->DeleteLocalRef(classLoaderClass);
return httpsClass;
}
#endif // HTTPS_BACKEND_ANDROID