一个简单，强大的解决方案

Question

我在使用Gmail PHP API时遇到了问题。

我想检索电子邮件的正文内容，但我只能检索包含附件的电子邮件！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;
    }
}

检索我知道的内容的第二个选项是使用位于标题部分的代码段，但它只检索50个左右的第一个字符，这不是非常有用。

Answer 1

我们做一个小实验吧。我给自己发了两条消息。一个有附件，一个没有。

请求：

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

<强>响应：

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

我只要求有效载荷，因为那是所有相关部分的所在：

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 } } ] } }

这些回复对应于代码中的$parts。正如你所看到的，如果你很幸运，$parts[0]['body']->data会给你你想要的东西，但大部分时间都没有。

这个问题通常有两种方法。你可以实现以下算法（你在PHP上比我好多了，但这是它的大致轮廓）：

遍历payload.parts并检查其中是否包含part，其中包含您要查找的正文（{1}}或text/plain）。如果有，您就完成了搜索。如果您正在解析上面没有附件的邮件，那就足够了。

再次执行第1步，但这一次使用text/html在您刚检查的parts内找到，递归。您最终会找到parts。如果您使用附件解析上述邮件，最终会找到您的part。

该算法可能类似于以下内容（JavaScript中的示例）：

body

更容易的选择是获取邮件的原始数据，并让已经编写的库为您完成工作：

请求：

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); } }

<强>响应：

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

第二种方法的最大缺点是，如果您获得原始消息，您将立即下载所有附件数据，这可能与您的用例数据相差甚远。

我不擅长PHP，但this看起来很有希望，如果你想要第二个解决方案！祝你好运！

Answer 2

更新：您可能需要在此下方检查我的第二个答案，以获得更完整的代码。

最后，我今天工作了，所以这里是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();
}

正如您所看到的，我的问题是，有时在有效负载 - ＆gt;部分中找不到正文，而是直接在有效负载 - ＆gt;正文中找到！（加上我为多个部分添加循环）。

希望这有助于其他人。

Answer 3

对于那些感兴趣的人，我大大改进了我的最后一个答案，使其使用text / html（并在必要时回退到text / plain）并将图像转换为base64附件，当打印为完整HTML时将自动加载！

代码根本不完美，而且太长而无法详细解释，但它对我有用。

随意接受并适应它（如果有必要，可以正确/改进）。

x = 640 pixels in width, 
2x = 750 pixels in width, 
3x = 1125 pixels in width

干杯。

Answer 4

我编写此代码是为了改进@ F3L1X79的答案，因为这会正确过滤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));
}

Answer 5

一个简单，强大的解决方案

我对其他答案不满意，因为它们都存在缺陷（扰流板中的细化），并且有些答案冗长且混杂了问询者（和我未曾寻找）的功能。

在其他答案中警告您潜在的问题：
没有纯文本后备
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）
或缺乏对有效载荷树结构的足够深入的搜索

所以我想我可以省去别人的麻烦，并共享我的代码（在我的整个收件箱中进行了测试）。

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<div id="react"></div>

Answer 6

作为进一步的改进，代码应该是递归的，还需要以“ full”格式加载消息以提取正文。您可以在以下三个函数中放入自己的类。

driver.get(r'https://markets......')
driver.find_element_by_css_selector('h2 span[data-mod-action="toggle-filter"]').click()
# 4 input, index 1 and 3 are hidden
inputDate = driver.find_elements_by_css_selector('.mod-ui-date-picker input')
inputDate[0].click()
driver.find_element_by_xpath('//*[@title="Next month"]').click()
driver.find_element_by_xpath("//*[@aria-label='1 Jan, %d']" %(y)).click() 
# wait until the element removed
wait.until(
    lambda d: len(d.find_elements_by_css_selector('.mod-ui-loading__overlay')) == 0
)
inputDate[2].click()
# select second date piker "[2]"
driver.find_element_by_xpath("(//*[@aria-label='5 Jan, %d'])[2]" %(y)).click()

使用Gmail PHP API无法获取电子邮件正文

6 个答案:

一个简单，强大的解决方案