Okhttp Retry

Specifically: As far as I can tell from the source, the ServicePoint. Dependency management is a technique for declaring, resolving and using dependencies required by the project in an automated fashion. If there is no credential available, we should return null to skip the retry. It's also able to recover from common connection problems and, on a connection failure, if a service has multiple IP addresses, it can retry the request to alternate addresses. PRs are welcome!. Please exercise caution when enabling auto-retrial. It makes writing web service clients easier. Welcome to the fifteenth ##java podcast. 这句话怎么理解呢?. dart is an dio client generator using source_gen and inspired by Chopper and Retrofit. Therefore, when using the manual approach described in this section of the guide, the underlying HttpUrlConnection class may be leveraging code from the OkHttp library. User friendly API. 0 compile 'com. 4 uses a version of the OkHttp client (details are a bit hard to find and a number of people like to specifically use the OkHttp API instead as it lets. Implement exponential back off. You may want to limit the number of retries that the OkHttp library makes in case of bad response from server. Value could be a specified period of time (in seconds) or a HTTP-date. The canonical reference for building a production grade API with Spring. okhttp3:okhttp-urlconnection:3. Network Interceptors. When a builder instance is available, it will have already been configured with all of the HttpBuilder-provided configuration. Dependency management is a technique for declaring, resolving and using dependencies required by the project in an automated fashion. Send a GET request to get login form. InputStream, Length As Int) Initializes the request and sets it to be a Http Put method. If you have not already done so, you might want to read the "getting-started. This article shows you how to use Apache HttpClient to send an HTTP GET/POST requests, JSON, authentication, timeout, redirection and some frequent used examples. html" sections, so that you have a good grounding of the basics. findConnection() immediately throws (before advancing the RouteSelector) - StreamAllocation. In IIS Manager, expand server name, expand Web sites, and then click the Web site that you want to modify. You may want to limit the number of retries that the OkHttp library makes in case of bad response from server. Permitted to short-circuit and not call Chain. http I thought Jesse Glick had added retry to GitHub API plugin. We are using failsafe for retry logic and jOOλ for a simplified streaming api. OkHttp can automatically retry unauthenticated requests forever. okhttp interceptors. There are three main cases this header is used: When sent with a 503 (Service Unavailable) response, this indicates how long the service is expected to be unavailable. Method Summary. Besides the feign-core dependency (which is also pulled in), we'll use a few plugins, especially: feign-okhttp for internally using Square's OkHttp client to make requests, feign-gson for using Google's GSON as JSON processor and feign-slf4j for using the Simple Logging Facade to log requests. Use clone() to make multiple calls with the same parameters to the same webserver; this may be used to implement polling or to retry a failed call. If there is no credential available, we should return null to skip the retry. This seemed to be the most flexible and intuitive since this truly is an Exception/Failure case. Without getting into why OkHttp decided to aggressively retry even the POST requests, I find the reasoning presented in the medium article half-baked (for the lack of a right word). whatever() all the time, especially since the service is read-only, so I added common get() operations to the companion object to do that for me:. When you are in the control of the backend API then you can make decisions t. The endpoints are defined inside of an interface using special retrofit annotations to encode details about the parameters and request method. E/PackageManager(978): updateAllSharedLibrariesLPw failed: Package com. Although I just saw their road map for 2. How can I create an exception class for spring-retry in Springboot ? @Retryable(value={SomeException. Dependency management is a technique for declaring, resolving and using dependencies required by the project in an automated fashion. Android Working with WebView – Building a Simple In-App Browser By Prushni Jani July 12, 2017 0 Comments Android’s WebView allows you to integrate a webpage as a part of the app. It is expected that loggin. Allows to set a debounce time and a maximum age per call. To use Feign create an interface and annotate it. I don't want to be doing LocalConfigurationStore. 0 compile 'com. See the Ribbon documentation for a description of what these properties do. android okhttp RetryAndFollowUpInterceptor 全部 android okhttp android中的okhttp okhttp okHttp 上传图片 android OKHttp封装 okhttp异步 okhttp的使用 okhttp拦截器 okhttp miudex retrof OKHttp缓存 okhttp okhttp OKHTTP okhttp okHttp okhttp Android okHttp Retrofit-Okhttp-RxJava RxJava+Retrofit+OkHttp Retrofit和OkHttp Android. This is helpful where the errors may be transient in nature (like a momentary network glitch). In OkHttp 2 the built-in disk cache is the only supported response cache. By default, Retrofit will give you sane defaults for your platform but it allows for customization. IIS currently supports HTTP/2 only over TLS. Network Interceptors. It assumes you have installed a recent version of sbt, such as sbt 1. Retry asynchronous functions 'com. Both of these APIs have been dropped. OkHttp: Android's HttpClient on Steroids. Authorizing and Using REST APIs This guide tells you how to authorize with Google and use Google REST APIs when you want your app to access Google APIs with the user's Google account over HTTP. Retry-After If an entity is temporarily unavailable, this instructs the client to try again later. E/PackageManager(978): updateAllSharedLibrariesLPw failed: Package com. Injecting OkHttpClient. OkHttp 库的设计和实现的首要目标是高效。这也是选择 OkHttp 的重要理由之一。OkHttp 提供了对最新的 HTTP 协议版本 HTTP/2 和 SPDY 的支持,这使得对同一个主机发出的所有请求都可以共享相同的套接字连接。. This page list down all java tutorials published on HowToDoInJava. Observe the application's original intent. Permitted to short-circuit and not call Chain. HttpClient throws NoHttpResponseException when it encounters such a condition. Besides the feign-core dependency (which is also pulled in), we'll use a few plugins, especially: feign-okhttp for internally using Square's OkHttp client to make requests, feign-gson for using Google's GSON as JSON processor and feign-slf4j for using the Simple Logging Facade to log requests. I searched for a generic solution, failing to find something useful I proceeded with the following: First a bit about the application: This project is to be used by diff. The provided customization will be applied on top of the existing configuration. Using content negotiation, the server selects one of the proposals, uses it and informs the client of its choice with the Content-Encoding response header. The duplicated POST -request is being sent exactly at the same time as what has been set to initialTimeoutMs (the 1st. exe, and then click OK. 返回数据的统一判断 7. Therefore as of now when comparing Android Volley vs Retrofit, Retrofit loses this one. Supports transparent gzip compression response. Understanding what is a reactive architecture in the context of an Android application — This 2nd part is about web components with OkHttp & Retrofit (playground project is available here). Build definition. If the URL's host has multiple IP addresses, failure to reach any individual IP address doesn't fail the overall request. Okhttp-wiki 之 Interceptors 拦截器. Could not fetch sources from navigator. In this Spring boot tutorial, learn how we can build applications using spring retry module facility where we have to call some methods where exception is sometimes expected and we have to retry the request. 4 uses a version of the OkHttp client (details are a bit hard to find and a number of people like to specifically use the OkHttp API instead as it lets. Survive backend redeployment with a DNS failover OkHttp client. run cts --retry 意见反馈 最近搜索 最新文章 小白教程 程序问答 程序問答 プログラムの質問と回答 프로그램 질문 및 답변. There are three major benefits to use: Auto Retry: If you set a request, it will retry it up to 20 times by default. If this bug is impacting your applications, please open an issue on our quickstart and we will investigate potential fixes. If you have a need to implement robust retry logic in your code, a proven way would be to use the spring retry library. Each feign client is part of an ensemble of components that work together to contact a remote server on demand, and the ensemble has a name that you give it as an application developer using the @FeignClient annotation. This seemed to be the most flexible and intuitive since this truly is an Exception/Failure case. bo 博文 来自: 孤影惆怅的博客. I have very briefly used OkHttp so thanks for bringing this up. enabled=true. In my previous blog posts (here, here and here) I showed you examples of server-sent events (SSE) applications that send messages from a server to a browser. Default behaviour of OkHttpClient. Fetch will seem familiar if you have used XMLHttpRequest or other networking APIs before. OkHttp, the Android HTTP Client from Square. 0 version, they might have a retry mechanism then. From asynchronous execution on a background thread, to automatic conversion of server responses to Java objects, Retrofit does almost everything for you. The provided customization will be applied on top of the existing configuration. The Retry-After response HTTP header indicates how long the user agent should wait before making a follow-up request. Upgrading from Previous Versions. By default, Retrofit can only deserialize HTTP bodies into OkHttp's ResponseBody type and it can only accept its RequestBody type for @Body. Awesome React Native is an awesome style list that curates the best React Native libraries, tools, tutorials, articles and more. Strong ordering that makes it easy to correctly populate your UI with data fetched asynchronously from the network. See the Ribbon documentation for a description of what these properties do. Unconcerned with OkHttp-injected headers like If-None-Match. Some people may want the immediate failure, while others may want different retry semantics. Dependency management is a technique for declaring, resolving and using dependencies required by the project in an automated fashion. com search form. This page list down all java tutorials published on HowToDoInJava. I have performed the operations like reading cookie values with the help of Interceptors. io (from here). Android Working with WebView – Building a Simple In-App Browser By Prushni Jani July 12, 2017 0 Comments Android’s WebView allows you to integrate a webpage as a part of the app. OKHttp is an Android HTTP client library from Square that reduces the steps needed. recover() returns true, indicating that a retry is permissible - higher level logic then retries the connection. Similar crashes have been reported in the popular networking library OkHttp #1520 #1338. OKHttp removes the need for network testing, recovering from common connection problems, and on a connection failure, it can retry the request with a different route. 0 version, they might have a retry mechanism then. Each Status-Code is described below, including a description of which method(s) it can follow and any metainformation required in the response. It makes for a better user experience. From asynchronous execution on a background thread, to automatic conversion of server responses to Java objects, Retrofit does almost everything for you. The code below is snapped from pom file of Retrofit 2. Converters. The retry functionality was pulled out of Spring Batch as of 2. We take an opinionated view of the Spring platform and third-party libraries, so that you can get started with minimum fuss. Define the Endpoints. io (from here). The specified InputStream will be read and added to the request. We also removed the catch in our request, as that is now handled by the HttpInterceptor. Dependency management is a technique for declaring, resolving and using dependencies required by the project in an automated fashion. In addition, the return value is always a parameterized Call object such as Call. As developers, we must be prepared to face different server-side solutions. Android tutorial about working with Retrofit HTTP library. Method Summary. When a HttpURLConnection is disconnected in the middle of connecting, this can lead to an infinite loop because: - StreamAllocation. By default, this client silently recovers from the following problems: Unreachable IP addresses. I don't see that happening on any of my connections (HTTP or HTTPS). Before starting the comparison let me first introduce these libraries: - Volley-:Volley is a networking library it offers great features like synchronous requests, asynchronous requests, prior. Interceptors are a powerful mechanism that can monitor, rewrite, and retry calls. If you would like to disable the retry logic with Spring Retry on the classpath, you can set spring. Permitted to short-circuit and not call Chain. PRs are welcome!. User friendly API. In Features view, double-click Module. Your hosts are Joseph Ottinger, dreamreal on the IRC channel, and Andrew Lombardi (kinabalu on IRC) from Mystic Coders. Permitted to retry and make multiple calls to Chain. All it needs to do is a single GET request and extract the data we are interested in. Permitted to retry and make multiple calls to Chain. Squareup OkHttpClient v3: Enabled by having the com. Value could be a specified period of time (in seconds) or a HTTP-date. Basically interceptors are equivalent to our Undertow Middleware. I will try to explain things by keeping it simple. Read DZone's 2019 Machine Learning Trend Report to see the future impact machine learning will have. Retrofit is the class through which your API interfaces are turned into callable objects. 0 ships with a truckload of features, including:. It makes writing web service clients easier. amitshekhariitbhu/Fast-Android-Networking Fast Android Networking is a powerful library for doing any type of. 返回数据的统一判断 7. retry(3) would immediately retry three times (without incremental back-off - not necessarily a good idea). Seems fairly simple — and it actually is. To master Android, we can't depend on a solution such as Parse. Welcome to the fifteenth ##java podcast. I need to retry request inside of OkHttp Interceptor. 9 , Bug Fixes. 这句话怎么理解呢?. Value could be a specified period of time (in seconds) or a HTTP-date. recover() returns true, indicating that a retry is permissible - higher level logic then retries the connection. For example: Try call - failed. okhttp3:okhttp-urlconnection:3. All modern Android apps need to do network requests. E/PackageManager(978): updateAllSharedLibrariesLPw failed: Package com. Commercial support and maintenance for the open source dependencies you use, backed by the project maintainers. Try call - failed. OkSse is an extension library for OkHttp to create a Server-Sent Event (SSE) client. From asynchronous execution on a background thread, to automatic conversion of server responses to Java objects, Retrofit does almost everything for you. My site was unstable and my clients furious, with a simple fix performance improved greatly and the instability disapear. protobuf API for gRPC over Protocol Buffers, including tools for serializing and de-serializing protobuf messages. 统一处理请求数据格式 3. NBK Shabab Offers. 1, it is getting socket timeout, but it seems that okhttp doesn't retry this request. This is meant for AMD users on Windows who want a faster AVD experience on par with HAXM, or cannot run with Hyper-V / WHPX enabled (e. It's time to kick off a brand-new Retrofit topic and mini series: call adapters. Server-sent events is an easy way to send messages from a server to the client in real time. How to configure retries with okclient ?. By default, Retrofit can only deserialize HTTP bodies into OkHttp's ResponseBody type and it can only accept its RequestBody type for @Body. Should probably be a core trait of the GitHub plugin as it will need some close-coupling there and would be of generic utility to anyone using the GitHub Branch Source, even if the default experience for users should be as currently implemented. The only implementation of this interface is in {@link com. OkHttp is the recommend HttpClient that’s used inside the Retrofit Networking Library. Volley excels at RPC-type operations used to populate a UI, such as fetching a page of search results as structured data. 747 dpi, touch INTERNAL, rotation 0, type BUILT_IN, FLAG_DEFAULT_DISPLAY, FLAG_ROTATES_WITH_CONTENT, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS}. In the Actions pane, click Add Native Module. dependencies { compile "com. 6) in my Android project. OkHttp is now required. Permitted to retry and make multiple calls to Chain. 最近遇到一个问题,pip install 无法下载安装,报错原因如下: Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken b y 'ProxyError('Cannot connect to proxy. Android Picasso Rewrite Retry Policy. OkHttp 库的设计和实现的首要目标是高效。这也是选择 OkHttp 的重要理由之一。OkHttp 提供了对最新的 HTTP 协议版本 HTTP/2 和 SPDY 的支持,这使得对同一个主机发出的所有请求都可以共享相同的套接字连接。. This page provides Java source code for StreamAllocation. okhttp » logging-interceptor OkHttp Logging Interceptor. 1 (Lollipop). service in your app it is more beneficial to use the Volley or OKHttp libraries instead - Volley may be a little hard to set up, but when it is done it is very easy to do networking • If we don't need to handle requests in a queue, prioritize requests, or schedule requests, we could use OkHttp. 12-08 23:25:16. In such cases, if we have to implement any retry functionality on any backend service call. 0 compile 'com. Overview; auth:import and auth:export; Firebase Realtime Database Operation Types; Deploy Targets. recover() returns true, indicating that a retry is permissible - higher level logic then retries the connection. 6) in my Android project. io (from here). From asynchronous execution on a background thread, to automatic conversion of server responses to Java objects, Retrofit does almost everything for you. OkHttp also makes it very easy to connect to the internet using Http. Without getting into why OkHttp decided to aggressively retry even the POST requests, I find the reasoning presented in the medium article half-baked (for the lack of a right word). atte Spring-retry not working in Springboot (Spring forum at Coderanch). Using content negotiation, the server selects one of the proposals, uses it and informs the client of its choice with the Content-Encoding response header. The OkHttp client builder definitely has various timeouts that you can set. Builder instance. We will set that number to 3 which means that if our client gets response code other that 2xx or 3xx it will retry the request 3 more times. HttpClient can also be instructed to retry the method even though the request may have already been processed by the server and the I/O exception has occurred while receiving the response. Intercept and retry call by means of OkHttp Interceptors. The server may send timeout to retry or close the connection permanently. The first line of a Response message is the Status-Line, consisting of the protocol version followed by a numeric status code and its associated textual phrase, with each element separated by SP characters. Each call yields its own HTTP request and response pair. In first part , we spotlighted what’s the idea behind a reactive architecture, and viewed fundamental basics of RxJava. Network Interceptors. 1 RFC 2616 Fielding, et al. When a builder instance is available, it will have already been configured with all of the HttpBuilder-provided configuration. Survive backend redeployment with a DNS failover OkHttp client. OkHttp3 is a third party open source library which is contributed by square company. By adding the okhttp3-integration module, an OkHttp instance will be internally created and registered. How to retry HTTP requests with OkHttp/Retrofit? I am using Retrofit/OkHttp (1. InputStream, Length As Int) Initializes the request and sets it to be a Http Put method. What is HTTP/2? HTTP/2 is a rework of how HTTP semantics flow over TCP connections, and HTTP/2 support is present in Windows 10 and Windows Server 2016. I don't find any request retry mechanism built-in to either of them. The provided customization will be applied on top of the existing configuration. recover() returns true, indicating that a retry is permissible - higher level logic then retries the connection indefinitely in a busy loop This bug does not occur in the latest version of OkHttp (3. Messing with it will cause extra broken connections when they ought to have succeeded. Use clone() to make multiple calls with the same parameters to the same webserver; this may be used to implement polling or to retry a failed call. Constructs parameters and make a POST request for authentication. It makes writing web service clients easier. ConnectionState. 因为在 OKHTTP 中的拦截器的执行过程是一个递归的过程,也就是它内部会通过 RealInterceptorChain 这个类去负责将所有的拦截器进行串起来。 只有所有的拦截器执行完毕之后,一个网络请求的响应 Response 才会被返回。. At my last job in Bing, one of my tasks is creating a test suite for an API. amitshekhariitbhu/Fast-Android-Networking Fast Android Networking is a powerful library for doing any type of. Builder instance. Implement exponential back off. The server may send timeout to retry or close the connection permanently. The post demonstrates how to achieve a retry using a new object called RetryableCallback which implements OKHTTP’s callback object and add some logic to it to handle retry. 前言 作为一个Android开发者对OkHttp这个网络请求框架一定不会陌生,它早已成为Android在网络请求方面的统治者,不关你是直接使用OkHttp还是使用Retrofit又或者其它对OkHttp的封装,说到底都是基于OkHttp。. 3 and above. 0 ships with a truckload of features, including:. In addition, the return value is always a parameterized Call object such as Call. 0 version, they might have a retry mechanism then. OKHttpSource code analysis Foreword: forOkHttpI am in touch with the time is not very long, has been using Retrofit + OkHttp to do network requests, but some students said that the interview may ask the framework source, so that the light is not enough, so they sprout the idea of the OkHttp …. OkHttp uses Call to model the task of satisfying your request through however many intermediate requests and responses are necessary. 1 Status-Line. This page provides Java source code for StreamAllocation. Configuring Auto Backup for JAR Integration The ‘Allow backup’ setting is enabled by default for your application for API 23 or above. run cts --retry 意见反馈 最近搜索 最新文章 小白教程 程序问答 程序問答 プログラムの質問と回答 프로그램 질문 및 답변. If there is a request with the same TaskId already running then this method will return False, and the response object will be released. To make processing more robust and less prone to failure, sometimes it helps to automatically retry a failed operation in case it might succeed on a subsequent attempt. This page provides Java source code for URLConnectionTest. Wait 2 seconds. Find published spring tutorials, REST API tutorials, Build, Logging and Unit test tutorials. getMessage()); } @Override public void onRequestSuccess(String result. 最近半年来身边开发的朋友越来越多的提到OkHttp,上谷歌百度一下,确实OkHttp成了时下最火的HTTP框架,于是我也开始放下Volley,转而关注OkHttp,五一期间仔细看了官方WiKi介绍(我喜欢学习官方的文档),现在把自己整理的官方教程分享给大家,希望给初学者带来帮助。. Glide is a fast and efficient image loading library for Android focused on smooth scrolling. Awesome React Native is an awesome style list that curates the best React Native libraries, tools, tutorials, articles and more. Send a GET request to get login form. Rank & Retrieve, Failed to connect to gateway. AWS Documentation » AWS Lambda » Developer Guide » AWS Lambda Applications » Best Practices for Working with AWS Lambda Functions The AWS Documentation website is getting a new look! Try it now and let us know what you think. The post demonstrates how to achieve a retry using a new object called RetryableCallback which implements OKHTTP’s callback object and add some logic to it to handle retry. 0 I have signed in to my Microsoft account in the App but my favourites and bookmarks that I have saved on. Unconcerned with OkHttp-injected headers like If-None-Match. The retry functionality was pulled out of Spring Batch as of 2. enabled=true. findConnection() immediately throws (before advancing the RouteSelector) - StreamAllocation. Strong ordering that makes it easy to correctly populate your UI with data fetched asynchronously from the network. In 2015, Google followed up by deprecating the Apache-based AndroidHttpClient with the release of Android 5. Okhttp-wiki 之 Interceptors 拦截器. As you can see we updated our constructor. x versions and jump onto Retrofit 2 directly which has a lot of new features and a changed internal API compared to the previous versions. Retrofit is type-safe REST client for Android and Java which aims to make it easier to consume RESTful web services. 爱词霸权威在线词典,为您提供retry的中文意思,retry的用法讲解,retry的读音,retry的同义词,retry的反义词,retry的例句等英语服务。. In IIS, we’ve implemented HTTP/2 as transparently as possible – you shouldn’t need to change anything in your application for HTTP/2 to work. Create the interceptor for your OkHttp client and set the retry number to something you like. My objective here is not to show how to use the spring retry project itself. Support http2, sharing the same socket for all requests from a machine. Published: February 26, 2018 • java. Ease of customization, for example, for retry and backoff. bo 博文 来自: 孤影惆怅的博客. The OkHttp library internally takes care of the retry loop, payload auto compression, Http/2 support, connection pooling, and response caching so you can avoid unnecessary network access. In OkHttp 2 the built-in disk cache is the only supported response cache. Asynchronously reads the response and writes it to the given OutputStream. Retrofit and volley both are the REST client libraries. AWS Documentation » AWS Lambda » Developer Guide » AWS Lambda Applications » Best Practices for Working with AWS Lambda Functions The AWS Documentation website is getting a new look! Try it now and let us know what you think. Retry Call Annotation. I searched for a generic solution, failing to find something useful I proceeded with the following: First a bit about the application: This project is to be used by diff. android okhttp RetryAndFollowUpInterceptor 全部 android okhttp android中的okhttp okhttp okHttp 上传图片 android OKHttp封装 okhttp异步 okhttp的使用 okhttp拦截器 okhttp miudex retrof OKHttp缓存 okhttp okhttp OKHTTP okhttp okHttp okhttp Android okHttp Retrofit-Okhttp-RxJava RxJava+Retrofit+OkHttp Retrofit和OkHttp Android. Retrofit offers you an extremely convenient way of creating and managing network requests. Particular because of Tristan Waddington for being a sounding board for OAuth and OkHttp internals. At my last job in Bing, one of my tasks is creating a test suite for an API. This can be archived via concurrency constructs of the Java language or of the Android framework. Send another GET request to Gmail. Constructs parameters and make a POST request for authentication. See the Change Log for recent changes. The following table provides details of all of the dependency versions that are provided by Spring Boot in its CLI (Command Line Interface), Maven dependency management, and Gradle plugin. Wait 1 second. Debugging and tracing tools. I don't find any request retry mechanism built-in to either of them. 0 version, they might have a retry mechanism then. Hence it is a good idea to add a retry ( and back-off) policy , for at least the important idempotent network calls. 因为在 OKHTTP 中的拦截器的执行过程是一个递归的过程,也就是它内部会通过 RealInterceptorChain 这个类去负责将所有的拦截器进行串起来。 只有所有的拦截器执行完毕之后,一个网络请求的响应 Response 才会被返回。. ResponseCache and OkHttp's OkResponseCache interfaces. Some people may want the immediate failure, while others may want different retry semantics. The first line of a Response message is the Status-Line, consisting of the protocol version followed by a numeric status code and its associated textual phrase, with each element separated by SP characters. java Caches HTTP and HTTPS responses to the filesystem so they may be reused, saving time and bandwidth. An invocation of a Retrofit method that sends a request to a webserver and returns a response. Without getting into why OkHttp decided to aggressively retry even the POST requests, I find the reasoning presented in the medium article half-baked (for the lack of a right word). OkHttp is now required. Basic Authentication with OkHttp example. If you add request headers yourself, make sure the logging interceptor is the last interceptor added to the OkHttp client. The Firebase SDKs handle all authentication and communication with the Firebase Realtime Database on your behalf. OkHttp Interceptors. 00384 fps, density 213, 216. Unlike InitializePost this method will enable the request to retry and send the data several times in case of IO errors. Retrofit and volley both are the REST client libraries. OKHttpSource code analysis Foreword: forOkHttpI am in touch with the time is not very long, has been using Retrofit + OkHttp to do network requests, but some students said that the interview may ask the framework source, so that the light is not enough, so they sprout the idea of the OkHttp …. When a HttpURLConnection is disconnected in the middle of connecting, this can lead to an infinite loop because: - StreamAllocation. From asynchronous execution on a background thread, to automatic conversion of server responses to Java objects, Retrofit does almost everything for you. Typically for JSON you use GSon, but you can add custom converters to process XML or other protocols. HttpClient throws NoHttpResponseException when it encounters such a condition. retry(3) would immediately retry three times (without incremental back-off - not necessarily a good idea). At a high level, the client is designed for both blocking synchronous and nonblocking asynchronous calls.