Don't log Conduit 404s as errors

Summary: Fixes T5695. A Conduit "method does not exist" exception is somewhat expected... there is no need to `phlog` the exception.

Test Plan: Called a non-existent Conduit method. Saw no exceptions in the error logs.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5695

Differential Revision: https://secure.phabricator.com/D10042

src/__phutil_library_map__.php

@@ -122,13 +122,15 @@ phutil_register_library_map(array(
     'ConduitAPIMethod' => 'applications/conduit/method/ConduitAPIMethod.php',
     'ConduitAPIRequest' => 'applications/conduit/protocol/ConduitAPIRequest.php',
     'ConduitAPIResponse' => 'applications/conduit/protocol/ConduitAPIResponse.php',
+    'ConduitApplicationNotInstalledException' => 'applications/conduit/protocol/exception/ConduitApplicationNotInstalledException.php',
     'ConduitCall' => 'applications/conduit/call/ConduitCall.php',
     'ConduitCallTestCase' => 'applications/conduit/call/__tests__/ConduitCallTestCase.php',
     'ConduitConnectConduitAPIMethod' => 'applications/conduit/method/ConduitConnectConduitAPIMethod.php',
     'ConduitConnectionGarbageCollector' => 'applications/conduit/garbagecollector/ConduitConnectionGarbageCollector.php',
-    'ConduitException' => 'applications/conduit/protocol/ConduitException.php',
+    'ConduitException' => 'applications/conduit/protocol/exception/ConduitException.php',
     'ConduitGetCertificateConduitAPIMethod' => 'applications/conduit/method/ConduitGetCertificateConduitAPIMethod.php',
     'ConduitLogGarbageCollector' => 'applications/conduit/garbagecollector/ConduitLogGarbageCollector.php',
+    'ConduitMethodNotFoundException' => 'applications/conduit/protocol/exception/ConduitMethodNotFoundException.php',
     'ConduitPingConduitAPIMethod' => 'applications/conduit/method/ConduitPingConduitAPIMethod.php',
     'ConduitQueryConduitAPIMethod' => 'applications/conduit/method/ConduitQueryConduitAPIMethod.php',
     'ConduitSSHWorkflow' => 'applications/conduit/ssh/ConduitSSHWorkflow.php',
@@ -2854,12 +2856,14 @@ phutil_register_library_map(array(
       'Phobject',
       'PhabricatorPolicyInterface',
     ),
+    'ConduitApplicationNotInstalledException' => 'ConduitMethodNotFoundException',
     'ConduitCallTestCase' => 'PhabricatorTestCase',
     'ConduitConnectConduitAPIMethod' => 'ConduitAPIMethod',
     'ConduitConnectionGarbageCollector' => 'PhabricatorGarbageCollector',
     'ConduitException' => 'Exception',
     'ConduitGetCertificateConduitAPIMethod' => 'ConduitAPIMethod',
     'ConduitLogGarbageCollector' => 'PhabricatorGarbageCollector',
+    'ConduitMethodNotFoundException' => 'ConduitException',
     'ConduitPingConduitAPIMethod' => 'ConduitAPIMethod',
     'ConduitQueryConduitAPIMethod' => 'ConduitAPIMethod',
     'ConduitSSHWorkflow' => 'PhabricatorSSHWorkflow',

src/applications/conduit/call/ConduitCall.php

@@ -172,16 +172,13 @@ final class ConduitCall {
     $method = ConduitAPIMethod::getConduitMethod($method_name);
 
     if (!$method) {
-      throw new ConduitException(
-        "Conduit method '{$method_name}' does not exist.");
+      throw new ConduitMethodNotFoundException($method);
     }
 
     $application = $method->getApplication();
     if ($application && !$application->isInstalled()) {
       $app_name = $application->getName();
-      throw new ConduitException(
-        "Method '{$method_name}' belongs to application '{$app_name}', ".
-        "which is not installed.");
+      throw new ConduitApplicationNotInstalledException($method, $app_name);
     }
 
     return $method;

src/applications/conduit/controller/PhabricatorConduitAPIController.php

@@ -104,7 +104,9 @@ final class PhabricatorConduitAPIController
         list($error_code, $error_info) = $auth_error;
       }
     } catch (Exception $ex) {
-      phlog($ex);
+      if (!($ex instanceof ConduitMethodNotFoundException)) {
+        phlog($ex);
+      }
       $result = null;
       $error_code = ($ex instanceof ConduitException
         ? 'ERR-CONDUIT-CALL'

src/applications/conduit/protocol/exception/ConduitApplicationNotInstalledException.php

@@ -0,0 +1,14 @@
+<?php
+
+final class ConduitApplicationNotInstalledException
+  extends ConduitMethodNotFoundException {
+
+  public function __construct($method, $application) {
+    parent::__construct(
+      pht(
+        "Method '%s' belongs to application '%s', which is not installed.",
+        $method,
+        $application));
+  }
+
+}

src/applications/conduit/protocol/exception/ConduitException.php

@@ -1,6 +1,9 @@
 <?php
 
-final class ConduitException extends Exception {
+/**
+ * @concrete-extensible
+ */
+class ConduitException extends Exception {
 
   private $errorDescription;
 
@@ -12,7 +15,7 @@ final class ConduitException extends Exception {
    * @param string Detailed error description.
    * @return this
    */
-  public function setErrorDescription($error_description) {
+  final public function setErrorDescription($error_description) {
     $this->errorDescription = $error_description;
     return $this;
   }
@@ -22,7 +25,7 @@ final class ConduitException extends Exception {
    *
    * @return string|null Error description, if one is available.
    */
-  public function getErrorDescription() {
+  final public function getErrorDescription() {
     return $this->errorDescription;
   }
 

src/applications/conduit/protocol/exception/ConduitMethodNotFoundException.php

@@ -0,0 +1,12 @@
+<?php
+
+/**
+ * @concrete-extensible
+ */
+class ConduitMethodNotFoundException extends ConduitException {
+
+  public function __construct($method) {
+    parent::__construct(pht("Conduit method '%s' does not exist.", $method));
+  }
+
+}