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无法使用 Gmail PHP API 获取电子邮件正文

php gmail-api
2022-08-30 14:23:01

我在使用 Gmail PHP API 时遇到问题。

我想检索电子邮件的正文内容，但我只能为包含附件的电子邮件检索它！我的问题是为什么？

这是我到目前为止的代码：

// Authentication things above...
$client = getClient();
$gmail = new Google_Service_Gmail($client);    
$list = $gmail->users_messages->listUsersMessages('me', ['maxResults' => 1000]);

while ($list->getMessages() != null) {   
    foreach ($list->getMessages() as $mlist) {               
        $message_id = $mlist->id;   
        $optParamsGet2['format'] = 'full';
        $single_message = $gmail->users_messages->get('me', $message_id, $optParamsGet2);

        $threadId = $single_message->getThreadId();
        $payload = $single_message->getPayload();
        $headers = $payload->getHeaders();
        $parts = $payload->getParts();
        //print_r($parts); PRINTS SOMETHING ONLY IF I HAVE ATTACHMENTS...
        $body = $parts[0]['body'];
        $rawData = $body->data;
        $sanitizedData = strtr($rawData,'-_', '+/');
        $decodedMessage = base64_decode($sanitizedData); //should display my body content
    }

    if ($list->getNextPageToken() != null) {
        $pageToken = $list->getNextPageToken();
        $list = $gmail->users_messages->listUsersMessages('me', ['pageToken' => $pageToken, 'maxResults' => 1000]);
    } else {
        break;
    }
}

检索我知道的内容的第二个选项是使用位于“标头”部分中的代码段，但它只检索前 50 个字符左右，这不是很有用。


答案 1

更新：您可能想检查我在此答案下方的第二个答案以获取更完整的代码。

最后，我今天工作了，所以这里有找到身体的完整代码答案 - 感谢@Tholle：

// Authentication things above
/*
 * Decode the body.
 * @param : encoded body  - or null
 * @return : the body if found, else FALSE;
 */
function decodeBody($body) {
    $rawData = $body;
    $sanitizedData = strtr($rawData,'-_', '+/');
    $decodedMessage = base64_decode($sanitizedData);
    if(!$decodedMessage){
        $decodedMessage = FALSE;
    }
    return $decodedMessage;
}

$client = getClient();
$gmail = new Google_Service_Gmail($client);

$list = $gmail->users_messages->listUsersMessages('me', ['maxResults' => 1000]);

try{
    while ($list->getMessages() != null) {

        foreach ($list->getMessages() as $mlist) {

            $message_id = $mlist->id;
            $optParamsGet2['format'] = 'full';
            $single_message = $gmail->users_messages->get('me', $message_id, $optParamsGet2);
            $payload = $single_message->getPayload();

            // With no attachment, the payload might be directly in the body, encoded.
            $body = $payload->getBody();
            $FOUND_BODY = decodeBody($body['data']);

            // If we didn't find a body, let's look for the parts
            if(!$FOUND_BODY) {
                $parts = $payload->getParts();
                foreach ($parts  as $part) {
                    if($part['body']) {
                        $FOUND_BODY = decodeBody($part['body']->data);
                        break;
                    }
                    // Last try: if we didn't find the body in the first parts, 
                    // let's loop into the parts of the parts (as @Tholle suggested).
                    if($part['parts'] && !$FOUND_BODY) {
                        foreach ($part['parts'] as $p) {
                            // replace 'text/html' by 'text/plain' if you prefer
                            if($p['mimeType'] === 'text/html' && $p['body']) {
                                $FOUND_BODY = decodeBody($p['body']->data);
                                break;
                            }
                        }
                    }
                    if($FOUND_BODY) {
                        break;
                    }
                }
            }
            // Finally, print the message ID and the body
            print_r($message_id . " : " . $FOUND_BODY);
        }

        if ($list->getNextPageToken() != null) {
            $pageToken = $list->getNextPageToken();
            $list = $gmail->users_messages->listUsersMessages('me', ['pageToken' => $pageToken, 'maxResults' => 1000]);
        } else {
            break;
        }
    }
} catch (Exception $e) {
    echo $e->getMessage();
}

正如你所看到的，我的问题是，有时身体不能在有效载荷>部件中找到，而是直接在有效载荷>身体中找到！（另外，我为多个部分添加了循环）。

希望这对其他人有所帮助。


答案 2

让我们做一个小实验。我已经给自己发了两条消息。一个有依恋，一个没有。

请求：

GET https://www.googleapis.com/gmail/v1/users/me/messages?maxResults=2

响应：

{
 "messages": [
  {
   "id": "14fe21fd6b3fb46f",
   "threadId": "14fe21fd6b3fb46f"
  },
  {
   "id": "14fe21f9341ed73c",
   "threadId": "14fe21f9341ed73c"
  }
 ],
 "nextPageToken": "08943597140129624594",
 "resultSizeEstimate": 3
}

我只要求有效载荷，因为这是所有相关部分所在的位置：

fields = payload

GET https://www.googleapis.com/gmail/v1/users/me/messages/14fe21fd6b3fb46f?fields=payload

GET https://www.googleapis.com/gmail/v1/users/me/messages/14fe21f9341ed73c?fields=payload

不带附件的邮件：

{
 "payload": {
  "parts": [
   {
    "partId": "0",
    "mimeType": "text/plain",
    "filename": "",
    "headers": [
     {
      "name": "Content-Type",
      "value": "text/plain; charset=UTF-8"
     }
    ],
    "body": {
     "size": 22,
     "data": "aGVjaz8gTm8gYXR0YWNobWVudD8NCg=="
    }
   },
   {
    "partId": "1",
    "mimeType": "text/html",
    "filename": "",
    "headers": [
     {
      "name": "Content-Type",
      "value": "text/html; charset=UTF-8"
     }
    ],
    "body": {
     "size": 43,
     "data": "PGRpdiBkaXI9Imx0ciI-aGVjaz8gTm8gYXR0YWNobWVudD88L2Rpdj4NCg=="
    }
   }
  ]
 }
}

带附件的邮件：

{
 "payload": {
  "parts": [
   {
    "mimeType": "multipart/alternative",
    "filename": "",
    "headers": [
     {
      "name": "Content-Type",
      "value": "multipart/alternative; boundary=001a1142e23c551e8e05200b4be0"
     }
    ],
    "body": {
     "size": 0
    },
    "parts": [
     {
      "partId": "0.0",
      "mimeType": "text/plain",
      "filename": "",
      "headers": [
       {
        "name": "Content-Type",
        "value": "text/plain; charset=UTF-8"
       }
      ],
      "body": {
       "size": 9,
       "data": "V293IG1hbg0K"
      }
     },
     {
      "partId": "0.1",
      "mimeType": "text/html",
      "filename": "",
      "headers": [
       {
        "name": "Content-Type",
        "value": "text/html; charset=UTF-8"
       }
      ],
      "body": {
       "size": 30,
       "data": "PGRpdiBkaXI9Imx0ciI-V293IG1hbjwvZGl2Pg0K"
      }
     }
    ]
   },
   {
    "partId": "1",
    "mimeType": "image/jpeg",
    "filename": "feelthebern.jpg",
    "headers": [
     {
      "name": "Content-Type",
      "value": "image/jpeg; name=\"feelthebern.jpg\""
     },
     {
      "name": "Content-Disposition",
      "value": "attachment; filename=\"feelthebern.jpg\""
     },
     {
      "name": "Content-Transfer-Encoding",
      "value": "base64"
     },
     {
      "name": "X-Attachment-Id",
      "value": "f_ieq3ev0i0"
     }
    ],
    "body": {
     "attachmentId": "ANGjdJ_2xG3WOiLh6MbUdYy4vo2VhV2kOso5AyuJW3333rbmk8BIE1GJHIOXkNIVGiphP3fGe7iuIl_MGzXBGNGvNslwlz8hOkvJZg2DaasVZsdVFT_5JGvJOLefgaSL4hqKJgtzOZG9K1XSMrRQAtz2V0NX7puPdXDU4gvalSuMRGwBhr_oDSfx2xljHEbGG6I4VLeLZfrzGGKW7BF-GO_FUxzJR8SizRYqIhgZNA6PfRGyOhf1s7bAPNW3M9KqWRgaK07WTOYl7DzW4hpNBPA4jrl7tgsssExHpfviFL7yL52lxsmbsiLe81Z5UoM",
     "size": 100446
    }
   }
  ]
 }
}

这些响应对应于代码中的 。如您所见，如果幸运的话，会给你你想要的东西，但大多数时候它不会。$parts$parts[0]['body']->data

通常有两种方法可以解决此问题。你可以实现以下算法（你比我更擅长PHP，但这是它的一般概述）：

  1. 遍历 并检查它是否包含具有您要查找的正文的 （要么要么）。如果有，您就完成了搜索。如果您要解析像上面没有附件的邮件，这就足够了。payload.partsparttext/plaintext/html
  2. 再次执行步骤1，但这次使用您刚刚检查的发现内部，递归。您最终会找到您的.如果您要解析像上面带有附件的邮件，这最终会为您找到.partspartspartbody

该算法可能如下所示（JavaScript 中的示例）：

var response = {
 "payload": {
  "parts": [
   {
    "mimeType": "multipart/alternative",
    "filename": "",
    "headers": [
     {
      "name": "Content-Type",
      "value": "multipart/alternative; boundary=001a1142e23c551e8e05200b4be0"
     }
    ],
    "body": {
     "size": 0
    },
    "parts": [
     {
      "partId": "0.0",
      "mimeType": "text/plain",
      "filename": "",
      "headers": [
       {
        "name": "Content-Type",
        "value": "text/plain; charset=UTF-8"
       }
      ],
      "body": {
       "size": 9,
       "data": "V293IG1hbg0K"
      }
     },
     {
      "partId": "0.1",
      "mimeType": "text/html",
      "filename": "",
      "headers": [
       {
        "name": "Content-Type",
        "value": "text/html; charset=UTF-8"
       }
      ],
      "body": {
       "size": 30,
       "data": "PGRpdiBkaXI9Imx0ciI-V293IG1hbjwvZGl2Pg0K"
      }
     }
    ]
   },
   {
    "partId": "1",
    "mimeType": "image/jpeg",
    "filename": "feelthebern.jpg",
    "headers": [
     {
      "name": "Content-Type",
      "value": "image/jpeg; name=\"feelthebern.jpg\""
     },
     {
      "name": "Content-Disposition",
      "value": "attachment; filename=\"feelthebern.jpg\""
     },
     {
      "name": "Content-Transfer-Encoding",
      "value": "base64"
     },
     {
      "name": "X-Attachment-Id",
      "value": "f_ieq3ev0i0"
     }
    ],
    "body": {
     "attachmentId": "ANGjdJ_2xG3WOiLh6MbUdYy4vo2VhV2kOso5AyuJW3333rbmk8BIE1GJHIOXkNIVGiphP3fGe7iuIl_MGzXBGNGvNslwlz8hOkvJZg2DaasVZsdVFT_5JGvJOLefgaSL4hqKJgtzOZG9K1XSMrRQAtz2V0NX7puPdXDU4gvalSuMRGwBhr_oDSfx2xljHEbGG6I4VLeLZfrzGGKW7BF-GO_FUxzJR8SizRYqIhgZNA6PfRGyOhf1s7bAPNW3M9KqWRgaK07WTOYl7DzW4hpNBPA4jrl7tgsssExHpfviFL7yL52lxsmbsiLe81Z5UoM",
     "size": 100446
    }
   }
  ]
 }
};

// In e.g. a plain text message, the payload is the only part.
var parts = [response.payload];

while (parts.length) {
  var part = parts.shift();
  if (part.parts) {
    parts = parts.concat(part.parts);
  }

  if(part.mimeType === 'text/html') {
    var decodedPart = decodeURIComponent(escape(atob(part.body.data.replace(/\-/g, '+').replace(/\_/g, '/'))));
    console.log(decodedPart);
  }
}

更简单的选择是只获取邮件的原始数据，然后让已经编写的库为您完成工作：

请求：

format = raw
fields = raw

GET https://www.googleapis.com/gmail/v1/users/me/messages/14fe21fd6b3fb46f?format=raw&fields=raw

响应：

{
 "raw": "TUlNRS1WZXJzaW9uOiAxLjANClJlY2VpdmVkOiBieSAxMC4yOC45OS4xOTYgd2l0aCBIVFRQOyBGcmksIDE4IFNlcCAyMDE1IDEzOjIzOjAxIC0wNzAwIChQRFQpDQpEYXRlOiBGcmksIDE4IFNlcCAyMDE1IDIyOjIzOjAxICswMjAwDQpEZWxpdmVyZWQtVG86IGVtdGhvbGluQGdtYWlsLmNvbQ0KTWVzc2FnZS1JRDogPENBRHNaTFJ5eGk2UGt0MHZnUS1iZHd1N2FNLWNHRmZKcEwrRHYyb3ZKOGp4SGN4VWhfQUBtYWlsLmdtYWlsLmNvbT4NClN1YmplY3Q6IFdoYXQgZGENCkZyb206IEVtaWwgVGhvbGluIDxlbXRob2xpbkBnbWFpbC5jb20-DQpUbzogRW1pbCBUaG9saW4gPGVtdGhvbGluQGdtYWlsLmNvbT4NCkNvbnRlbnQtVHlwZTogbXVsdGlwYXJ0L2FsdGVybmF0aXZlOyBib3VuZGFyeT0wMDFhMTE0NjhmMTY1YzUwNDUwNTIwMGI0YzYxDQoNCi0tMDAxYTExNDY4ZjE2NWM1MDQ1MDUyMDBiNGM2MQ0KQ29udGVudC1UeXBlOiB0ZXh0L3BsYWluOyBjaGFyc2V0PVVURi04DQoNCmhlY2s_IE5vIGF0dGFjaG1lbnQ_DQoNCi0tMDAxYTExNDY4ZjE2NWM1MDQ1MDUyMDBiNGM2MQ0KQ29udGVudC1UeXBlOiB0ZXh0L2h0bWw7IGNoYXJzZXQ9VVRGLTgNCg0KPGRpdiBkaXI9Imx0ciI-aGVjaz8gTm8gYXR0YWNobWVudD88L2Rpdj4NCg0KLS0wMDFhMTE0NjhmMTY1YzUwNDUwNTIwMGI0YzYxLS0="
}

第二种方法的最大缺点是，如果您原始获取消息，您将立即下载所有附件数据，这对于您的用例来说可能是很多数据。

我不擅长PHP，但如果你想使用第二个解决方案，这看起来很有希望！祝你好运！


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