feat: add independent common http client

gradle.properties

@@ -2,4 +2,4 @@ org.gradle.jvmargs=-Xmx4096m -Dfile.encoding=UTF-8
 android.useAndroidX=true
 kotlin.code.style=official
 android.nonTransitiveRClass=true
-PUBLISH_VERSION=0.4.0
+PUBLISH_VERSION=0.4.1

sdk-core/src/main/java/com/xuqm/sdk/network/CommonHttpClient.kt

@@ -0,0 +1,31 @@
+package com.xuqm.sdk.network
+
+import org.json.JSONObject
+import java.io.BufferedReader
+import java.io.InputStreamReader
+import java.io.OutputStreamWriter
+import java.net.HttpURLConnection
+import java.net.URL
+
+object CommonHttpClient {
+
+    fun postJson(url: String, body: String): JSONObject {
+        val conn = (URL(url).openConnection() as HttpURLConnection).apply {
+            requestMethod = "POST"
+            setRequestProperty("Content-Type", "application/json")
+            setRequestProperty("Accept", "application/json")
+            doOutput = true
+            connectTimeout = 10_000
+            readTimeout = 10_000
+        }
+        try {
+            OutputStreamWriter(conn.outputStream, Charsets.UTF_8).use { it.write(body) }
+            val code = conn.responseCode
+            val stream = if (code in 200..299) conn.inputStream else conn.errorStream
+            val text = BufferedReader(InputStreamReader(stream, Charsets.UTF_8)).use { it.readText() }
+            return JSONObject(text)
+        } finally {
+            conn.disconnect()
+        }
+    }
+}