修复因大小写引发的user agent重复的bug

app/src/main/java/io/legado/app/help/http/HttpHelper.kt

@@ -1,5 +1,6 @@
 package io.legado.app.help.http
 
+import io.legado.app.constant.AppConst
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.http.cronet.CronetInterceptor
 import io.legado.app.help.http.cronet.CronetLoader
@@ -36,12 +37,14 @@ val okHttpClient: OkHttpClient by lazy {
         .followSslRedirects(true)
         .addInterceptor(Interceptor { chain ->
             val request = chain.request()
-                .newBuilder()
-                .addHeader("Keep-Alive", "300")
-                .addHeader("Connection", "Keep-Alive")
-                .addHeader("Cache-Control", "no-cache")
-                .build()
-            chain.proceed(request)
+            val builder = request.newBuilder()
+            if (request.header(AppConst.UA_NAME) == null) {
+                builder.addHeader(AppConst.UA_NAME, AppConfig.userAgent)
+            }
+            builder.addHeader("Keep-Alive", "300")
+            builder.addHeader("Connection", "Keep-Alive")
+            builder.addHeader("Cache-Control", "no-cache")
+            chain.proceed(builder.build())
         })
     if (!AppConfig.isGooglePlay && AppConfig.isCronet && CronetLoader.install()) {
         builder.addInterceptor(CronetInterceptor(null))

app/src/main/java/io/legado/app/help/http/OkHttpUtils.kt

@@ -1,7 +1,5 @@
 package io.legado.app.help.http
 
-import io.legado.app.constant.AppConst
-import io.legado.app.help.config.AppConfig
 import io.legado.app.utils.EncodingDetect
 import io.legado.app.utils.GSON
 import io.legado.app.utils.Utf8BomUtils
@@ -25,7 +23,6 @@ suspend fun OkHttpClient.newCallResponse(
 ): Response {
     return withContext(IO) {
         val requestBuilder = Request.Builder()
-        requestBuilder.header(AppConst.UA_NAME, AppConfig.userAgent)
         requestBuilder.apply(builder)
         var response: Response? = null
         for (i in 0..retry) {
@@ -94,10 +91,6 @@ fun ResponseBody.text(encode: String? = null): String {
 
 fun Request.Builder.addHeaders(headers: Map<String, String>) {
     headers.forEach {
-        if (it.key == AppConst.UA_NAME) {
-            //防止userAgent重复
-            removeHeader(AppConst.UA_NAME)
-        }
         addHeader(it.key, it.value)
     }
 }