feat: Retry all http methods

#1710

Author: monochromata

core/support/src/main/kotlin/au/com/dius/pact/core/support/HttpClient.kt

@@ -18,6 +18,7 @@ import org.apache.hc.client5.http.socket.ConnectionSocketFactory
 import org.apache.hc.client5.http.socket.PlainConnectionSocketFactory
 import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactoryBuilder
 import org.apache.hc.client5.http.ssl.TrustSelfSignedStrategy
+import org.apache.hc.core5.http.HttpRequest
 import org.apache.hc.core5.http.config.RegistryBuilder
 import org.apache.hc.core5.http.message.BasicHeader
 import org.apache.hc.core5.ssl.SSLContexts
@@ -70,6 +71,13 @@ sealed class Auth {
   }
 }
 
+private class RetryAnyMethod(
+  maxRetries: Int,
+  defaultRetryInterval: TimeValue
+): DefaultHttpRequestRetryStrategy(maxRetries, defaultRetryInterval) {
+  override fun handleAsIdempotent(request: HttpRequest) = true
+}
+
 /**
  * HTTP client support functions
  */
@@ -86,7 +94,7 @@ object HttpClient : KLogging() {
     insecureTLS: Boolean = false
   ): Pair<CloseableHttpClient, CredentialsProvider?> {
     val builder = HttpClients.custom().useSystemProperties()
-      .setRetryStrategy(DefaultHttpRequestRetryStrategy(maxPublishRetries,
+      .setRetryStrategy(RetryAnyMethod(maxPublishRetries,
         TimeValue.ofMilliseconds(publishRetryInterval.toLong())))
 
     val defaultHeaders = mutableMapOf<String, String>()

core/support/src/test/groovy/au/com/dius/pact/core/support/HttpClientSpec.groovy

@@ -1,7 +1,10 @@
 package au.com.dius.pact.core.support
 
+import org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec
 import org.apache.hc.client5.http.impl.classic.MainClientExec
 import org.apache.hc.client5.http.protocol.RequestDefaultHeaders
+import org.apache.hc.core5.http.HttpRequest
+import org.apache.hc.core5.http.Method
 import spock.lang.Specification
 
 class HttpClientSpec extends Specification {
@@ -30,4 +33,26 @@ class HttpClientSpec extends Specification {
     defaultHeaders[0].name == 'Authorization'
     defaultHeaders[0].value == 'Bearer 1234abcd'
   }
+
+  def 'http client should retry any requests for any method'(Method method) {
+    def uri = new URI('http://localhost')
+    def request = Mock(HttpRequest)
+    request.method >> method
+    def client = HttpClient.INSTANCE.newHttpClient(null, uri, 1, 1, false).component1()
+    def retryStrategy = null
+    def execChain = client.execChain
+    while (retryStrategy == null && execChain != null) {
+      if (execChain.handler instanceof HttpRequestRetryExec) {
+        retryStrategy = execChain.handler.retryStrategy
+      } else {
+        execChain = execChain.next
+      }
+    }
+
+    expect:
+    retryStrategy.handleAsIdempotent(request) == true
+
+    where:
+    method << Method.values()
+  }
 }