Move response to own class

Implement warning output
Implement warning when URL and string provided for HTML/plain
Turn allowempty to config key
Add option to prefer URL over string for HTML/plain
Add user agent to curl requests
Update OpenAPI
Bump version to 0.5

File.class.php

@@ -12,6 +12,7 @@ class File {
         curl_setopt($ch, CURLOPT_URL, $this->url);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $follow);
+        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; KumiSystemsMailer/0.5; +https://expmail.kumi.systems/doc/)");
         curl_setopt($ch, CURLOPT_HEADER, true);
         curl_setopt($ch, CURLOPT_NOBODY, true);
         curl_setopt($ch, CURLOPT_TIMEOUT, 10);
@@ -65,6 +66,7 @@ class File {
         curl_setopt($ch, CURLOPT_URL, $this->url);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $follow);
+        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; KumiSystemsMailer/0.5; +https://expmail.kumi.systems/doc/)");
         curl_setopt($ch, CURLOPT_HEADER, false);
         curl_setopt($ch, CURLOPT_NOBODY, false);
         curl_setopt($ch, CURLOPT_TIMEOUT, 10);

Mail.class.php

@@ -12,14 +12,13 @@ class Mail {
         global $MAIL_HOST, $MAIL_USER, $MAIL_PASS, $MAIL_STARTTLS, $MAIL_SMTPS, $MAIL_PORT;
         $this->mailer = new PHPMailer(true);
         $this->mailer->isSMTP();
-        $this->mailer->AllowEmpty = true;
         $this->mailer->Host = $host ?: $MAIL_HOST;
         $this->mailer->SMTPAuth = (bool) $MAIL_USER;
         $this->mailer->Username = $user ?: $MAIL_USER;
         $this->mailer->Password = $password ?: $MAIL_PASS;
         $this->mailer->SMTPSecure = $MAIL_STARTTLS ? PHPMailer::ENCRYPTION_STARTTLS : ($MAIL_SMTPS ? PHPMailer::ENCRYPTION_SMTPS : false);
         $this->mailer->Port = $port ?: ($MAIL_PORT ?: ($MAIL_SMTPS ? 465 : 587));
-        $this->mailer->XMailer = "Kumi Systems Mailer 0.1 (https://kumi.systems/)";
+        $this->mailer->XMailer = "Kumi Systems Mailer 0.5 (https://kumi.systems/)";
     }
 
     function add_attachment($content, $filename=null, $cid=null) {
@@ -68,6 +67,10 @@ class Mail {
         }
     }
 
+    function allow_empty($boolean) {
+        $this->mailer->AllowEmpty = $boolean;
+    }
+
     static function FromRequest($req) {
         $mail = new self();
 
@@ -76,12 +79,14 @@ class Mail {
         $mail->add_ccs($req->get_ccs());
         $mail->add_bccs($req->get_bccs());
     
-        $html = $req->prepare_html();
+        $html = $req->prepare_html($req->has_config("urlbeforestring"));
-        $text = $req->prepare_text(!$req->has_config("noconversion"));
+        $text = $req->prepare_text(!$req->has_config("noconversion"), $req->has_config("urlbeforestring"));
         $mail->add_content($html, $text);
     
         $mail->add_attachments($req->get_attachments(true, true, $req->has_config("ignoredlfails")));
 
+        $mail->allow_empty($req->has_config("allowempty"));
+
         return $mail;
     }
 

Request.class.php

@@ -77,8 +77,15 @@ class Request {
         return $this->json["config"];
     }
 
-    function get_html() {
+    function get_html($urlbeforestring=false) {
-        if ($this->json["html"]) {
+        if ($this->json["html"] && $this->json["htmlurl"]) {
+            if ($urlbeforestring) {
+                trigger_error("Both `html` and `htmlurl` provided - using `htmlurl` as `urlbeforestring` config key was also provided", E_USER_WARNING);
+            } else {
+                trigger_error("Both `html` and `htmlurl` provided - using `html`", E_USER_WARNING);
+            }
+        }
+        if ($this->json["html"] && !$urlbeforestring) {
             $html = $this->json["html"];
         } else if ($this->json["htmlurl"]) {
             try {
@@ -87,6 +94,8 @@ class Request {
             } catch (\Exception $e) {
                 throw new Exception("Could not fetch URL for HTML message: " . $e->getMessage());
             }
+        } else if ($this->json["html"]) {
+            $html = $this->json["html"];
         }
 
         return $html;
@@ -123,8 +132,15 @@ class Request {
         }
     }
 
-    function get_text($conversion=true) {
+    function get_text($conversion=true, $urlbeforestring=false) {
-        if ($this->json["text"]) {
+        if ($this->json["text"] && $this->json["texturl"]) {
+            if ($urlbeforestring) {
+                trigger_error("Both `text` and `texturl` provided - using `texturl` as `urlbeforestring` config key was also provided", E_USER_WARNING);
+            } else {
+                trigger_error("Both `text` and `texturl` provided - using `text`", E_USER_WARNING);
+            }
+        }
+        if ($this->json["text"] && !$urlbeforestring) {
             $text = $this->json["text"];
         } else if ($this->json["texturl"]) {
             try {
@@ -133,6 +149,8 @@ class Request {
             } catch (\Exception $e) {
                 throw new Exception("Could not fetch URL for plain text message: " . $e->getMessage());
             }
+        } else if ($this->json["text"]) {
+            $text = $this->json["text"];
         } else if ($conversion) {
             if ($html=$this->get_html()) {
                 $text = html_entity_decode(
@@ -149,8 +167,8 @@ class Request {
         return in_array($key, $this->get_config());
     }
 
-    function prepare_html() {
+    function prepare_html($urlbeforestring=false) {
-        return $this->prepare_string($this->get_html());
+        return $this->prepare_string($this->get_html($urlbeforestring));
     }
 
     function prepare_string($string) {
@@ -158,8 +176,8 @@ class Request {
         return $string;
     }
 
-    function prepare_text($conversion=true) {
+    function prepare_text($conversion=true, $urlbeforestring=false) {
-        return $this->prepare_string($this->get_text($conversion));
+        return $this->prepare_string($this->get_text($conversion, $urlbeforestring));
     }
 
 }

Response.class.php

@@ -0,0 +1,24 @@
+<?php
+
+class Response {
+    private $error;
+    private $warnings;
+
+    function handle_warning($warning) {
+        if (!$this->warnings) $this->warnings = array();
+        array_push($this->warnings, $warning);
+    }
+
+    function handle_exception($e) {
+        $this->error = $e->getMessage();
+        $this->respond();
+    }
+
+    function respond() {
+        header('Content-Type: application/json');
+        $response = array("status" => $this->error ? "error" : "success");
+        if ($this->error) $response["error"] = $this->error;
+        if ($this->warnings) $response["warnings"] = $this->warnings;
+        die(json_encode($response));
+    }
+}

doc/swagger.yaml

@@ -1,7 +1,7 @@
 openapi: 3.0.0
 info:
   description: A simple endpoint to send email messages
-  version: '0.4'
+  version: '0.5'
   title: EXPMail
   contact:
     email: support@kumi.systems
@@ -36,17 +36,18 @@ paths:
                   error:
                     type: string
                     description: 'Error message, only included if an error has occurred'
+                  warning:
+                    type: array
+                    description: 'Array of warning messages generated during the sending process, if any'
+                    items:
+                      type: string
+                      
 servers:
   - url: 'https://expmail.kumi.live'
 components:
   schemas:
     Config:
       type: string
-      required:
-        - key
-      properties:
-        key:
-          type: string
     Placeholder:
       type: object
       required:
@@ -139,8 +140,10 @@ components:
           type: array
           description: >
             Array of `Config` keys to change the default behaviour
-              * `noconversion` - Do not automatically convert HTML to plain text if no plain text message is explicitly given
+              * `allowempty` - Allow messages to have an empty body, would otherwise return an error
               * `ignoredlfails` - If an attachment fails to download, just leave it out and continue processing the message
+              * `noconversion` - Do not automatically convert HTML to plain text if no plain text message is explicitly given
+              * `urlbeforestring` - If both a string and a URL are given for the HTML or plain text content, prefer URL (else: prefer string)
           items:
             $ref: '#/components/schemas/Config'
         key:

sender.php

@@ -3,21 +3,27 @@
 require_once 'config.php';
 require_once 'Mail.class.php';
 require_once 'Request.class.php';
+require_once 'Response.class.php';
+
+function handle_exception($e) {
+    global $res;
+    $res->handle_exception($e);
+}
+
+function handle_warning($errno, $errstr) {
+    global $res;
+    if ($res) { 
+        $res->handle_warning($errstr);
+    }
+}
+
+$res = new Response();
+
+set_exception_handler("handle_exception");
+set_error_handler("handle_warning", E_USER_WARNING);
 
-try {
 $req = new Request(file_get_contents('php://input'));
 $mail = Mail::FromRequest($req);
 $mail->send();
 
-    $response = array(
+$res->respond();
-        "status" => "success"
-    );
-
-} catch (\Exception $e) {
-    $response = array(
-        "status" => "error",
-        "error" => "{$e->getMessage()}"
-    );
-};
-
-echo json_encode($response);