Groovy built-in REST HTTP client

Question

I heard that Groovy has a built-in REST HTTP client  The only library I can find is HttpBuilder  is this it   Basically I m looking for a way to do HTTP GETs from inside Groovy code without having to import any libraries  if at all possible   But since this module doesn t appear to be a part of core Groovy I m not sure if I have the right lib here

User · Answer

HTTPBuilder is it  Very easy to use   import groovyx net http HTTPBuilder  def http   new HTTPBuilder  https   google com   def html   http get path     search   query    q  waffles      It is especially useful if you need error handling and generally more functionality than just fetching content with GET

User · Answer

I don t think http-builder is a Groovy module  but rather an external API on top of apache http-client so you do need to import classes and download a bunch of APIs  You are better using Gradle or  Grab to download the jar and dependencies    Grab group  org codehaus groovy modules http-builder   module  http-builder   version  0 7 1    import groovyx net http   import static groovyx net http ContentType   import static groovyx net http Method     Note  since the CodeHaus site went down  you can find the JAR at  https   mvnrepository com artifact org codehaus groovy modules http-builder http-builder

User · Answer

The simplest one got to be   def html    http   google com  toURL   text

User · Answer

If your needs are simple and you want to avoid adding additional dependencies you may be able to use the getText   methods that Groovy adds to the java net URL class   new URL  http   stackoverflow com   getText       or  new URL  http   stackoverflow com            getText connectTimeout  5000                   readTimeout  10000                   useCaches  true                   allowUserInteraction  false                   requestProperties    Connection    close      If you are expecting binary data back there is also similar functionality provided by the newInputStream   methods

User · Answer

Native Groovy GET and POST     GET def get   new URL  https   httpbin org get   openConnection    def getRC   get getResponseCode    println getRC   if getRC equals 200         println get getInputStream   getText           POST def post   new URL  https   httpbin org post   openConnection    def message      message   this is a message    post setRequestMethod  POST   post setDoOutput true  post setRequestProperty  Content-Type    application json   post getOutputStream   write message getBytes  UTF-8     def postRC   post getResponseCode    println postRC   if postRC equals 200         println post getInputStream   getText

User · Answer

import groovyx net http HTTPBuilder   public class HttpclassgetrRoles        static void main String   args            def baseUrl   new URL  http   test city com api Cirtxyz GetUser             HttpURLConnection connection    HttpURLConnection  baseUrl openConnection             connection addRequestProperty  Accept    application json            connection with              doOutput   true            requestMethod    GET             println content text

User · Answer

You can take advantage of Groovy features like with    improvements to URLConnection  and simplified getters setters   GET   String getResult   new URL  http   mytestsite bloop   text   POST   String postResult   HttpURLConnection new URL  http   mytestsite bloop   openConnection    with       requestMethod    POST      doOutput   true     setRequestProperty  Content-Type             Set your content type      outputStream withPrintWriter  printWriter - gt          printWriter write           Your post data  Could also use withWriter   if you don t want to write a String                Can check  responseCode  here if you like      postResult   inputStream text    Using  inputStream text  because  content  will throw an exception when empty       Note  the POST will start when you try to read a value from the HttpURLConnection  such as responseCode  inputStream text  or getHeaderField

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