无法使用 Gmail 获取电子邮件正文 PHP API
Cannot get the body of email with Gmail PHP API
我在使用 Gmail 时遇到问题 PHP API。
我想检索邮件的正文内容，但我只能检索带有附件的邮件！我的问题是为什么？
到目前为止，这是我的代码：
// 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;
}
}
据我所知，检索内容的第二个选项是使用位于 Headers 部分的片段，但它只检索前 50 个左右的字符，这不是很有用。
我们来做个小实验。我给自己发了两条消息。一个有附件，一个没有。
要求：
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
}
我只要求有效负载，因为所有相关部分都在那里：
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
没有附件的邮件：
{
"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
}
}
]
}
}
这些响应对应于您代码中的 $parts。如你所见，如果你运气好，$parts[0]['body']->data会给你你想要的，但大多数时候它不会。
通常有两种解决此问题的方法。你可以实现下面的算法（你在 PHP 方面比我好得多，但这是它的大纲）：
- 遍历
payload.parts 并检查它是否包含具有您要查找的正文的 part（text/plain 或 text/html）。如果有，您就完成了搜索。如果您正在解析像上面那样没有附件的邮件，这就足够了。
- 再次执行第 1 步，但这次使用在
parts 中找到的 parts，递归地检查。您最终会找到您的 part。如果你正在解析一封像上面那样带有附件的邮件，这最终会找到你的 body.
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，让已经编写好的库为您完成工作：
要求：
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，如果您获取原始消息，您将立即下载所有附件数据，这对于您的用例来说可能是太多的数据。
我不擅长 PHP，但如果您想使用第二种解决方案，this 看起来很有希望！祝你好运！
更新：您可能想查看我下面的第二个答案以获得更完整的代码。
终于，我今天工作了，所以这是找到尸体的完整代码答案 - 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 $e->getMessage();
}
如您所见，我的问题是，有时无法在 payload->parts 中找到 body，而是直接在 payload->body！ （加上我为多个部分添加了循环）。
希望这对其他人有帮助。
对于那些感兴趣的人，我大大改进了我的最后一个答案，使其与 text/html 一起使用（并在必要时回退到 text/plain）并将图像转换为将自动加载的 base64 附件完整打印时 HTML!
代码一点也不完美，而且太长无法详细解释，但它对我有用。
随时接受并改编（如有必要，可能correct/improve）。
// Authentication things above
/*
* Decode the body.
* @param : encoded body - or null
* @return : the body if found, else FALSE;
*/
function decodeBody($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();
$parts = $payload->getParts();
// With no attachment, the payload might be directly in the body, encoded.
$body = $payload->getBody();
$FOUND_BODY = FALSE;
// If we didn't find a body, let's look for the parts
if(!$FOUND_BODY) {
foreach ($parts as $part) {
if($part['parts'] && !$FOUND_BODY) {
foreach ($part['parts'] as $p) {
if($p['parts'] && count($p['parts']) > 0){
foreach ($p['parts'] as $y) {
if(($y['mimeType'] === 'text/html') && $y['body']) {
$FOUND_BODY = decodeBody($y['body']->data);
break;
}
}
} else if(($p['mimeType'] === 'text/html') && $p['body']) {
$FOUND_BODY = decodeBody($p['body']->data);
break;
}
}
}
if($FOUND_BODY) {
break;
}
}
}
// let's save all the images linked to the mail's body:
if($FOUND_BODY && count($parts) > 1){
$images_linked = array();
foreach ($parts as $part) {
if($part['filename']){
array_push($images_linked, $part);
} else{
if($part['parts']) {
foreach ($part['parts'] as $p) {
if($p['parts'] && count($p['parts']) > 0){
foreach ($p['parts'] as $y) {
if(($y['mimeType'] === 'text/html') && $y['body']) {
array_push($images_linked, $y);
}
}
} else if(($p['mimeType'] !== 'text/html') && $p['body']) {
array_push($images_linked, $p);
}
}
}
}
}
// special case for the wdcid...
preg_match_all('/wdcid(.*)"/Uims', $FOUND_BODY, $wdmatches);
if(count($wdmatches)) {
$z = 0;
foreach($wdmatches[0] as $match) {
$z++;
if($z > 9){
$FOUND_BODY = str_replace($match, 'image0' . $z . '@', $FOUND_BODY);
} else {
$FOUND_BODY = str_replace($match, 'image00' . $z . '@', $FOUND_BODY);
}
}
}
preg_match_all('/src="cid:(.*)"/Uims', $FOUND_BODY, $matches);
if(count($matches)) {
$search = array();
$replace = array();
// let's trasnform the CIDs as base64 attachements
foreach($matches[1] as $match) {
foreach($images_linked as $img_linked) {
foreach($img_linked['headers'] as $img_lnk) {
if( $img_lnk['name'] === 'Content-ID' || $img_lnk['name'] === 'Content-Id' || $img_lnk['name'] === 'X-Attachment-Id'){
if ($match === str_replace('>', '', str_replace('<', '', $img_lnk->value))
|| explode("@", $match)[0] === explode(".", $img_linked->filename)[0]
|| explode("@", $match)[0] === $img_linked->filename){
$search = "src=\"cid:$match\"";
$mimetype = $img_linked->mimeType;
$attachment = $gmail->users_messages_attachments->get('me', $mlist->id, $img_linked['body']->attachmentId);
$data64 = strtr($attachment->getData(), array('-' => '+', '_' => '/'));
$replace = "src=\"data:" . $mimetype . ";base64," . $data64 . "\"";
$FOUND_BODY = str_replace($search, $replace, $FOUND_BODY);
}
}
}
}
}
}
}
// If we didn't find the body in the last parts,
// let's loop for the first parts (text-html only)
if(!$FOUND_BODY) {
foreach ($parts as $part) {
if($part['body'] && $part['mimeType'] === 'text/html') {
$FOUND_BODY = decodeBody($part['body']->data);
break;
}
}
}
// With no attachment, the payload might be directly in the body, encoded.
if(!$FOUND_BODY) {
$FOUND_BODY = decodeBody($body['data']);
}
// Last try: if we didn't find the body in the last parts,
// let's loop for the first parts (text-plain only)
if(!$FOUND_BODY) {
foreach ($parts as $part) {
if($part['body']) {
$FOUND_BODY = decodeBody($part['body']->data);
break;
}
}
}
if(!$FOUND_BODY) {
$FOUND_BODY = '(No message)';
}
// Finally, print the message ID and the body
print_r($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 $e->getMessage();
}
干杯。
我写这段代码是为了改进@F3L1X79 的答案，因为它可以正确过滤 html 响应。
<?php
ini_set("display_errors", 1);
ini_set("track_errors", 1);
ini_set("html_errors", 1);
error_reporting(E_ALL);
require_once __DIR__ . '/vendor/autoload.php';
session_start();
function decodeBody($body) {
$rawData = $body;
$sanitizedData = strtr($rawData,'-_', '+/');
$decodedMessage = base64_decode($sanitizedData);
if(!$decodedMessage){
$decodedMessage = FALSE;
}
return $decodedMessage;
}
function fetchMails($gmail, $q) {
try{
$list = $gmail->users_messages->listUsersMessages('me', array('q' => $q));
while ($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'] && $part['mimeType'] == 'text/html') {
$FOUND_BODY = decodeBody($part['body']->data);
break;
}
}
} if(!$FOUND_BODY) {
foreach ($parts as $part) {
// Last try: if we didn't find the body in the first parts,
// let's loop into the parts of the parts (as @Tholle suggested).
if($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 . " <br> <br> <br> *-*-*- " . $FOUND_BODY);
}
if ($list->getNextPageToken() != null) {
$pageToken = $list->getNextPageToken();
$list = $gmail->users_messages->listUsersMessages('me', array('pageToken' => $pageToken));
} else {
break;
}
}
} catch (Exception $e) {
echo $e->getMessage();
}
}
$client = new Google_Client();
$client->setAuthConfig('client_secrets.json');
$client->addScope(Google_Service_Gmail::GMAIL_READONLY);
if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
$client->setAccessToken($_SESSION['access_token']);
$gmail = new Google_Service_Gmail($client);
$q = ' after:2016/11/7';
fetchMails($gmail, $q);
} else {
$redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . '/gmail-api/oauth2callback.php';
header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
}
作为进一步改进，代码应该是递归的，您还需要以 "full" 格式加载消息以提取正文。下面三个函数你可以放入自己的class.
private function decodeBody($body) {
$rawData = $body;
$sanitizedData = strtr($rawData,'-_', '+/');
$decodedMessage = base64_decode($sanitizedData);
if(!$decodedMessage)
return false;
return $decodedMessage;
}
private function decodeParts($parts)
{
foreach ($parts as $part)
{
if ($part->getMimeType() === 'text/html' && $part->getBody())
if ($result = $this->decodeBody($part->getBody()->getData()))
return $result;
}
foreach ($parts as $part)
{
if ($result = $this->decodeParts($part->getParts()))
return $result;
}
}
/**
* @param Google_Service_Gmail_Message $message
* @return bool|null|string
*/
public function getMessageBody($message)
{
$payload = $message->getPayload();
if ($result = $this->decodeBody($payload->getBody()->getData()))
return $result;
return $this->decodeParts($payload->getParts());
}
一个简单、稳健的解决方案
我对其他答案不满意，因为它们都有缺陷（剧透中的详细说明），有些很长并且混合了提问者（和我）没有寻找的功能。
警告您其他答案中的潜在问题：
没有纯文本回退
或无法处理 falsy 消息正文 - 字符串“0”（不太可能发生，但不太可能）
或者缺乏对负载树结构的足够深入的搜索
所以我想我会省去其他人的麻烦并分享我的代码（在我的整个收件箱上测试过）。
// input: the message object (not the payload!)
// output: html or plain text
function msg_body($msg) {
$body = msg_body_recursive($msg->payload);
return array_key_exists('html', $body) ? $body['html'] : $body['plain'];
}
function msg_body_recursive($part) {
if($part->mimeType == 'text/html') {
return ['html' => decodeBody($part->body->data)];
} else if($part->mimeType == 'text/plain') {
return ['plain' => decodeBody($part->body->data)];
} else if($part->parts) {
$return = [];
foreach($part->parts as $sub_part) {
$result = msg_body_recursive($sub_part);
$return = array_merge($return, $result);
if(array_key_exists('html', $return))
break;
}
return $return;
}
return [];
}
function decodeBody($encoded) {
$sanitizedData = strtr($encoded,'-_', '+/');
return base64_decode($sanitizedData);
}
我只是想补充@F3L1X79 的答案，在你打破 foreach 循环之前，你必须检查 $FOUND_BODY 变量不是 FALSE，所以我在每次打破之前添加了一个 If 条件；在搜身中。如果不这样做，即使找不到尸体，代码也会中断。
if($FOUND_BODY !== false) break;
我在使用 Gmail 时遇到问题 PHP API。
我想检索邮件的正文内容，但我只能检索带有附件的邮件！我的问题是为什么？
到目前为止，这是我的代码：
// 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;
}
}
据我所知，检索内容的第二个选项是使用位于 Headers 部分的片段，但它只检索前 50 个左右的字符，这不是很有用。
我们来做个小实验。我给自己发了两条消息。一个有附件，一个没有。
要求：
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
}
我只要求有效负载，因为所有相关部分都在那里：
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
没有附件的邮件：
{
"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
}
}
]
}
}
这些响应对应于您代码中的 $parts。如你所见，如果你运气好，$parts[0]['body']->data会给你你想要的，但大多数时候它不会。
通常有两种解决此问题的方法。你可以实现下面的算法（你在 PHP 方面比我好得多，但这是它的大纲）：
- 遍历
payload.parts并检查它是否包含具有您要查找的正文的part（text/plain或text/html）。如果有，您就完成了搜索。如果您正在解析像上面那样没有附件的邮件，这就足够了。 - 再次执行第 1 步，但这次使用在
parts中找到的parts，递归地检查。您最终会找到您的part。如果你正在解析一封像上面那样带有附件的邮件，这最终会找到你的body.
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，让已经编写好的库为您完成工作：
要求：
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，如果您获取原始消息，您将立即下载所有附件数据，这对于您的用例来说可能是太多的数据。
我不擅长 PHP，但如果您想使用第二种解决方案，this 看起来很有希望！祝你好运！
更新：您可能想查看我下面的第二个答案以获得更完整的代码。
终于，我今天工作了，所以这是找到尸体的完整代码答案 - 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 $e->getMessage();
}
如您所见，我的问题是，有时无法在 payload->parts 中找到 body，而是直接在 payload->body！ （加上我为多个部分添加了循环）。
希望这对其他人有帮助。
对于那些感兴趣的人，我大大改进了我的最后一个答案，使其与 text/html 一起使用（并在必要时回退到 text/plain）并将图像转换为将自动加载的 base64 附件完整打印时 HTML!
代码一点也不完美，而且太长无法详细解释，但它对我有用。
随时接受并改编（如有必要，可能correct/improve）。
// Authentication things above
/*
* Decode the body.
* @param : encoded body - or null
* @return : the body if found, else FALSE;
*/
function decodeBody($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();
$parts = $payload->getParts();
// With no attachment, the payload might be directly in the body, encoded.
$body = $payload->getBody();
$FOUND_BODY = FALSE;
// If we didn't find a body, let's look for the parts
if(!$FOUND_BODY) {
foreach ($parts as $part) {
if($part['parts'] && !$FOUND_BODY) {
foreach ($part['parts'] as $p) {
if($p['parts'] && count($p['parts']) > 0){
foreach ($p['parts'] as $y) {
if(($y['mimeType'] === 'text/html') && $y['body']) {
$FOUND_BODY = decodeBody($y['body']->data);
break;
}
}
} else if(($p['mimeType'] === 'text/html') && $p['body']) {
$FOUND_BODY = decodeBody($p['body']->data);
break;
}
}
}
if($FOUND_BODY) {
break;
}
}
}
// let's save all the images linked to the mail's body:
if($FOUND_BODY && count($parts) > 1){
$images_linked = array();
foreach ($parts as $part) {
if($part['filename']){
array_push($images_linked, $part);
} else{
if($part['parts']) {
foreach ($part['parts'] as $p) {
if($p['parts'] && count($p['parts']) > 0){
foreach ($p['parts'] as $y) {
if(($y['mimeType'] === 'text/html') && $y['body']) {
array_push($images_linked, $y);
}
}
} else if(($p['mimeType'] !== 'text/html') && $p['body']) {
array_push($images_linked, $p);
}
}
}
}
}
// special case for the wdcid...
preg_match_all('/wdcid(.*)"/Uims', $FOUND_BODY, $wdmatches);
if(count($wdmatches)) {
$z = 0;
foreach($wdmatches[0] as $match) {
$z++;
if($z > 9){
$FOUND_BODY = str_replace($match, 'image0' . $z . '@', $FOUND_BODY);
} else {
$FOUND_BODY = str_replace($match, 'image00' . $z . '@', $FOUND_BODY);
}
}
}
preg_match_all('/src="cid:(.*)"/Uims', $FOUND_BODY, $matches);
if(count($matches)) {
$search = array();
$replace = array();
// let's trasnform the CIDs as base64 attachements
foreach($matches[1] as $match) {
foreach($images_linked as $img_linked) {
foreach($img_linked['headers'] as $img_lnk) {
if( $img_lnk['name'] === 'Content-ID' || $img_lnk['name'] === 'Content-Id' || $img_lnk['name'] === 'X-Attachment-Id'){
if ($match === str_replace('>', '', str_replace('<', '', $img_lnk->value))
|| explode("@", $match)[0] === explode(".", $img_linked->filename)[0]
|| explode("@", $match)[0] === $img_linked->filename){
$search = "src=\"cid:$match\"";
$mimetype = $img_linked->mimeType;
$attachment = $gmail->users_messages_attachments->get('me', $mlist->id, $img_linked['body']->attachmentId);
$data64 = strtr($attachment->getData(), array('-' => '+', '_' => '/'));
$replace = "src=\"data:" . $mimetype . ";base64," . $data64 . "\"";
$FOUND_BODY = str_replace($search, $replace, $FOUND_BODY);
}
}
}
}
}
}
}
// If we didn't find the body in the last parts,
// let's loop for the first parts (text-html only)
if(!$FOUND_BODY) {
foreach ($parts as $part) {
if($part['body'] && $part['mimeType'] === 'text/html') {
$FOUND_BODY = decodeBody($part['body']->data);
break;
}
}
}
// With no attachment, the payload might be directly in the body, encoded.
if(!$FOUND_BODY) {
$FOUND_BODY = decodeBody($body['data']);
}
// Last try: if we didn't find the body in the last parts,
// let's loop for the first parts (text-plain only)
if(!$FOUND_BODY) {
foreach ($parts as $part) {
if($part['body']) {
$FOUND_BODY = decodeBody($part['body']->data);
break;
}
}
}
if(!$FOUND_BODY) {
$FOUND_BODY = '(No message)';
}
// Finally, print the message ID and the body
print_r($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 $e->getMessage();
}
干杯。
我写这段代码是为了改进@F3L1X79 的答案，因为它可以正确过滤 html 响应。
<?php
ini_set("display_errors", 1);
ini_set("track_errors", 1);
ini_set("html_errors", 1);
error_reporting(E_ALL);
require_once __DIR__ . '/vendor/autoload.php';
session_start();
function decodeBody($body) {
$rawData = $body;
$sanitizedData = strtr($rawData,'-_', '+/');
$decodedMessage = base64_decode($sanitizedData);
if(!$decodedMessage){
$decodedMessage = FALSE;
}
return $decodedMessage;
}
function fetchMails($gmail, $q) {
try{
$list = $gmail->users_messages->listUsersMessages('me', array('q' => $q));
while ($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'] && $part['mimeType'] == 'text/html') {
$FOUND_BODY = decodeBody($part['body']->data);
break;
}
}
} if(!$FOUND_BODY) {
foreach ($parts as $part) {
// Last try: if we didn't find the body in the first parts,
// let's loop into the parts of the parts (as @Tholle suggested).
if($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 . " <br> <br> <br> *-*-*- " . $FOUND_BODY);
}
if ($list->getNextPageToken() != null) {
$pageToken = $list->getNextPageToken();
$list = $gmail->users_messages->listUsersMessages('me', array('pageToken' => $pageToken));
} else {
break;
}
}
} catch (Exception $e) {
echo $e->getMessage();
}
}
$client = new Google_Client();
$client->setAuthConfig('client_secrets.json');
$client->addScope(Google_Service_Gmail::GMAIL_READONLY);
if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
$client->setAccessToken($_SESSION['access_token']);
$gmail = new Google_Service_Gmail($client);
$q = ' after:2016/11/7';
fetchMails($gmail, $q);
} else {
$redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . '/gmail-api/oauth2callback.php';
header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
}
作为进一步改进，代码应该是递归的，您还需要以 "full" 格式加载消息以提取正文。下面三个函数你可以放入自己的class.
private function decodeBody($body) {
$rawData = $body;
$sanitizedData = strtr($rawData,'-_', '+/');
$decodedMessage = base64_decode($sanitizedData);
if(!$decodedMessage)
return false;
return $decodedMessage;
}
private function decodeParts($parts)
{
foreach ($parts as $part)
{
if ($part->getMimeType() === 'text/html' && $part->getBody())
if ($result = $this->decodeBody($part->getBody()->getData()))
return $result;
}
foreach ($parts as $part)
{
if ($result = $this->decodeParts($part->getParts()))
return $result;
}
}
/**
* @param Google_Service_Gmail_Message $message
* @return bool|null|string
*/
public function getMessageBody($message)
{
$payload = $message->getPayload();
if ($result = $this->decodeBody($payload->getBody()->getData()))
return $result;
return $this->decodeParts($payload->getParts());
}
一个简单、稳健的解决方案
我对其他答案不满意，因为它们都有缺陷（剧透中的详细说明），有些很长并且混合了提问者（和我）没有寻找的功能。
警告您其他答案中的潜在问题：
没有纯文本回退
或无法处理 falsy 消息正文 - 字符串“0”（不太可能发生，但不太可能）
或者缺乏对负载树结构的足够深入的搜索
所以我想我会省去其他人的麻烦并分享我的代码（在我的整个收件箱上测试过）。
// input: the message object (not the payload!)
// output: html or plain text
function msg_body($msg) {
$body = msg_body_recursive($msg->payload);
return array_key_exists('html', $body) ? $body['html'] : $body['plain'];
}
function msg_body_recursive($part) {
if($part->mimeType == 'text/html') {
return ['html' => decodeBody($part->body->data)];
} else if($part->mimeType == 'text/plain') {
return ['plain' => decodeBody($part->body->data)];
} else if($part->parts) {
$return = [];
foreach($part->parts as $sub_part) {
$result = msg_body_recursive($sub_part);
$return = array_merge($return, $result);
if(array_key_exists('html', $return))
break;
}
return $return;
}
return [];
}
function decodeBody($encoded) {
$sanitizedData = strtr($encoded,'-_', '+/');
return base64_decode($sanitizedData);
}
我只是想补充@F3L1X79 的答案，在你打破 foreach 循环之前，你必须检查 $FOUND_BODY 变量不是 FALSE，所以我在每次打破之前添加了一个 If 条件；在搜身中。如果不这样做，即使找不到尸体，代码也会中断。
if($FOUND_BODY !== false) break;