FETCH command did not return any message

@emersion I want get all message from inbox , but I did not find the source code about it.

* 35 FETCH (UID 17746 ENVELOPE ("Mon, 29 Apr 2024 08:08:11 -0700" "=?utf-8?B?UmU6IFtlbWVyc2lvbi9nby1pbWFwXSBGRVRDSCBjb21tYW5kIGRpZCBub3QgcmV0dXJuIGFueSBtZXNzYWdlKElzc3VlICM2MTcp?=" (("=?utf-8?B?U2ltb24gU2Vy?=" NIL "notifications" "github.com")) (("=?utf-8?B?U2ltb24gU2Vy?=" NIL "notifications" "github.com")) (("=?utf-8?B?U2ltb24gU2Vy?=" NIL "notifications" "github.com")) (("=?utf-8?B?Z28taW1hcA==?=" NIL "go-imap" "noreply.github.com")) (("=?utf-8?B?YW9oYW5ob25nemhp?=" NIL "aohanhongzhi" "qq.com")("=?utf-8?B?YXV0aG9y?=" NIL "author" "noreply.github.com")) NIL NIL "<emersion/go-imap/issues/617/2082994692@github.com>") BODY[] {6430}
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Date: Mon, 29 Apr 2024 08:08:11 -0700
From: Simon Ser <notifications@github.com>
Reply-To: emersion/go-imap <reply+AI4XFF6GNOCPPE4WDOHD3KWEHOMNXEVBNHHIOJ2PUI@reply.github.com>
To: emersion/go-imap <go-imap@noreply.github.com>
Cc: aohanhongzhi <aohanhongzhi@qq.com>, 
 Author <author@noreply.github.com>
Message-ID: <emersion/go-imap/issues/617/2082994692@github.com>
In-Reply-To: <emersion/go-imap/issues/617@github.com>
References: <emersion/go-imap/issues/617@github.com>
Subject: Re: [emersion/go-imap] FETCH command did not return any message
 (Issue #617)
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Please use code blocks and copy-paste the source code, instead of posting screenshots.

Can you try setting `Options.DebugWriter = os.Stdout` to dump the raw IMAP?

-- 
Reply to this email directly or view it on GitHub:
https://github.com/emersion/go-imap/issues/617#issuecomment-2082994692
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<p></p>
<p dir="auto">Please use code blocks and copy-paste the source code, instead of posting screenshots.</p>
<p dir="auto">Can you try setting <code class="notranslate">Options.DebugWriter = os.Stdout</code> to dump the raw IMAP?</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">&mdash;<br />Reply to this email directly, <a href="https://github.com/emersion/go-imap/issues/617#issuecomment-2082994692">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AI4XFF3TKHOOIJWEH4MKM3DY7ZO5XAVCNFSM6AAAAABG45IJWSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAOBSHE4TINRZGI">unsubscribe</a>.<br />You are receiving this because you authored the thread.<img src="https://github.com/notifications/beacon/AI4XFFYFRNYQ3ZWMG4SLQRTY7ZO5XA5CNFSM6AAAAABG45IJWSWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTT4E75AI.gif" height="1" width="1" alt="" /><span style="color: transparent; font-size: 0; display: none; visibility: hidden; overflow: hidden; opacity: 0; width: 0; height: 0; max-width: 0; max-height: 0; mso-hide: all">Message ID: <span>&lt;emersion/go-imap/issues/617/2082994692</span><span>@</span><span>github</span><span>.</span><span>com&gt;</span></span></p>
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)
T56 OK FETCH Completed
2024-04-30 08:22:38 [INFO] Date: 2024-04-29 08:08:11 -0700 -0700 /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:132
2024-04-30 08:22:38 [INFO] Subject: Re: [emersion/go-imap] FETCH command did not return any message (Issue #617) /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:137
2024-04-30 08:22:38 [INFO] From: ["Simon Ser" <notifications@github.com>] /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:144
T57 MOVE 35 "DONE"
* OK [COPYUID 1546245200 17746 266]
* 35 EXPUNGE
T57 OK MOVE Done
T58 FETCH 36 (UID ENVELOPE BODY[])
* 36 FETCH (UID 17748 ENVELOPE ("Mon, 29 Apr 2024 17:17:09 -0700" "=?utf-8?B?W0dpdEh1Yl0gQSB0aGlyZC1wYXJ0eSBPQXV0aCBhcHBsaWNhdGlvbiBoYXMgYmVlbiBhZGRlZCB0byB5b3VyYWNjb3VudA==?=" (("=?utf-8?B?R2l0SHVi?=" NIL "noreply" "github.com")) (("=?utf-8?B?R2l0SHVi?=" NIL "noreply" "github.com")) (("=?utf-8?B?R2l0SHVi?=" NIL "noreply" "github.com")) (("=?utf-8?B?YW9oYW5ob25nemhp?=" NIL "aohanhongzhi" "qq.com")) NIL NIL NIL "<66303885163ab_a917fc10225d@lowworker-79bdf5fdb-lntqv.mail>") BODY[] {3264}
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Date: Mon, 29 Apr 2024 17:17:09 -0700
From: GitHub <noreply@github.com>
To: aohanhongzhi <aohanhongzhi@qq.com>
Message-ID: <66303885163ab_a917fc10225d@lowworker-79bdf5fdb-lntqv.mail>
Subject: [GitHub] A third-party OAuth application has been added to your
 account
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Hey aohanhongzhi!

A third-party OAuth application (Gitpod ) with user:email scopes was recently authorized to access your account.
Visit https://github.com/settings/connections/applications/484069277e293e6d2a2a for more information.

To see this and other security events for your account, visit https://github.com/settings/security-log

If you run into problems, please contact support by visiting https://github.com/contact

Thanks,
The GitHub Team

)
T58 OK FETCH Completed
2024-04-30 08:22:44 [INFO] Date: 2024-04-29 17:17:09 -0700 -0700 /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:132
2024-04-30 08:22:44 [INFO] Subject: [GitHub] A third-party OAuth application has been added to your account /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:137
2024-04-30 08:22:44 [INFO] From: ["GitHub" <noreply@github.com>] /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:144
T59 MOVE 36 "DONE"
* OK [COPYUID 1546245200 17748 267]
* 36 EXPUNGE
T59 OK MOVE Done
T60 FETCH 37 (UID ENVELOPE BODY[])
T60 OK Mails not exist!
2024-04-30 08:22:49 [ERRO] 37 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T61 FETCH 38 (UID ENVELOPE BODY[])
T61 OK Mails not exist!
2024-04-30 08:23:04 [ERRO] 38 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T62 FETCH 39 (UID ENVELOPE BODY[])
T62 OK Mails not exist!
2024-04-30 08:23:19 [ERRO] 39 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T63 FETCH 40 (UID ENVELOPE BODY[])
T63 OK Mails not exist!
2024-04-30 08:23:34 [ERRO] 40 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T64 FETCH 41 (UID ENVELOPE BODY[])
T64 OK Mails not exist!
2024-04-30 08:23:49 [ERRO] 41 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T65 FETCH 42 (UID ENVELOPE BODY[])
T65 OK Mails not exist!
2024-04-30 08:24:04 [ERRO] 42 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T66 FETCH 43 (UID ENVELOPE BODY[])
T66 OK Mails not exist!
2024-04-30 08:24:19 [ERRO] 43 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T67 FETCH 44 (UID ENVELOPE BODY[])
T67 OK Mails not exist!
2024-04-30 08:24:34 [ERRO] 44 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T68 FETCH 45 (UID ENVELOPE BODY[])
T68 OK Mails not exist!
2024-04-30 08:24:49 [ERRO] 45 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T69 FETCH 46 (UID ENVELOPE BODY[])
T69 OK Mails not exist!
2024-04-30 08:25:04 [ERRO] 46 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
T70 FETCH 47 (UID ENVELOPE BODY[])
T70 OK Mails not exist!
2024-04-30 08:25:19 [ERRO] 47 FETCH command did not return any message /Users/HOX4SGH/Project/Go/go-resume/mailv2.go:96
Exiting.

my code

package main

import (
    "crypto/tls"
    "encoding/csv"
    "os"
    "regexp"
    "strings"
    "time"

    nested "github.com/aohanhongzhi/nested-logrus-formatter"
    log "github.com/sirupsen/logrus"

    "io"

    "github.com/emersion/go-imap/v2"
    "github.com/emersion/go-imap/v2/imapclient"
    "github.com/emersion/go-message/mail"
)

func GetEmailCSV() {
    File, err := os.OpenFile("Resume12.csv", os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666)
    if err != nil {
        log.Error(err)
    }
    defer File.Close()
    //创建写入接口
    WriterCsv := csv.NewWriter(File)

    nested.LogInit(false)
    c, err := imapclient.DialTLS("imap.qq.com:993", &imapclient.Options{
        TLSConfig: &tls.Config{
            InsecureSkipVerify: true,
        },
        DebugWriter: os.Stdout,
    })
    if err != nil {
        log.Fatalf("failed to dial IMAP server: %v", err)
    }
    defer c.Close()

    if err := c.Login("aohanhongzhi@qq.com", "password, I can send to your email").Wait(); err != nil {
        log.Fatalf("failed to login: %v", err)
    }

    // 这里新建文件夹是有效的。 处理过的邮件，可以分类下。就好了。这样没有处理的就会在INBOX里。
    //if err := c.Create("DONE", nil).Wait(); err != nil {
    //  t.Fatalf("Create() = %v", err)
    //}

    mailboxes, err := c.List("", "%", nil).Collect()
    if err != nil {
        log.Fatalf("failed to list mailboxes: %v", err)
    }
    log.Printf("Found %v mailboxes", len(mailboxes))
    for _, mbox := range mailboxes {
        log.Printf(" - %v", mbox.Mailbox)
    }

    mailBox := "INBOX"
    selectedMbox, err := c.Select(mailBox, nil).Wait()
    if err != nil {
        log.Fatalf("failed to select INBOX: %v", err)
    }
    log.Printf("%v contains %v messages", mailBox, selectedMbox.NumMessages)

    if selectedMbox.NumMessages > 0 {
        // 只读取没有读取过的邮件
        total := int(selectedMbox.NumMessages)
        for i := 1; i <= total; i++ {
            email(total, i, c, WriterCsv)
            time.Sleep(5 * time.Second)
            if i%30 == 0 {
                time.Sleep(10 * time.Second)
            }
        }
    }

    if err := c.Logout().Wait(); err != nil {
        log.Fatalf("failed to logout: %v", err)
    }
}

func email(total, i int, c *imapclient.Client, WriterCsv *csv.Writer) {

    seqSet := imap.SeqSetNum(uint32(i))
    fetchOptions := &imap.FetchOptions{Envelope: true,
        UID:         true,
        BodySection: []*imap.FetchItemBodySection{{}}}
    fetchCmd := c.Fetch(seqSet, fetchOptions)
    defer fetchCmd.Close()

    //  这里会卡住。因为上面defer  fetchCmd.Close() 没有正确关闭，所以单独提取成一个方法，方法执行完成也就defer执行了。这里就不会卡主了
    msg := fetchCmd.Next()
    if msg == nil {
        log.Errorf("%v FETCH command did not return any message", i)
        time.Sleep(10 * time.Second)
        return
    }

    // Find the body section in the response
    var bodySection imapclient.FetchItemDataBodySection
    ok := false
    for {
        item := msg.Next()
        if item == nil {
            break
        }
        bodySection, ok = item.(imapclient.FetchItemDataBodySection)
        if ok {
            break
        }
        time.Sleep(200 * time.Millisecond)
    }
    if !ok {
        log.Fatalf("FETCH command did not return body section")
    }

    // Read the message via the go-message library
    mr, err := mail.CreateReader(bodySection.Literal)
    if err != nil {
        log.Fatalf("failed to create mail reader: %v", err)
    }

    // Print a few header fields
    var dataString string
    h := mr.Header
    if date, err := h.Date(); err != nil {
        log.Printf("failed to parse Date header field: %v", err)
    } else {
        dataString = date.Format("2006-01-02 15:04:05")
        log.Printf("Date: %v", date)
    }
    if subject, err := h.Text("Subject"); err != nil {
        log.Printf("failed to parse Subject header field: %v", err)
    } else {
        log.Printf("Subject: %v", subject)
    }
    if from, err := h.AddressList("From"); err != nil {
        log.Printf("failed to parse To header field: %v", err)
    } else {
        address := from[0].Address
        if !strings.Contains(address, "service@notice.shixiseng.com") {
            log.Printf("From: %v", from)
            c.Move(seqSet, "DONE")
            if strings.Contains(address, "") {

            }
            //fetchCmd.Close()
            return
        }
    }

    // Process the message's parts
    for {
        p, err := mr.NextPart()
        if err == io.EOF {
            break
        } else if err != nil {
            log.Fatalf("failed to read message part: %v", err)
        }

        switch h := p.Header.(type) {
        case *mail.InlineHeader:
            // This is the message's text (can be plain-text or HTML)
            b, _ := io.ReadAll(p.Body)
            htmlContent := string(b)
            //          log.Printf("====>Inline text: %v", string(htmlContent))
            // 将信息解析后写入数据库， 1. 按照学校，毕业时间，分别处理。 检索简历里面是否含有关键字，进一步分析和处理。 关键字匹配系统。
            //  学校建立白名单，非白名单的直接删除。
            // 自动给符合条件的发送邮件或者短信，填写问卷，收集问卷再筛选符合条件的同学。

            // 使用正则表达式解析 HTML 内容，提取所需字段
            re := regexp.MustCompile(`(?s)font-size:\s*20px;.*?>(.*?)<\/td>`)
            match := re.FindStringSubmatch(htmlContent)
            var userAllInfo []string
            var userInfo string
            if len(match) > 1 {
                userInfo = match[1]
                log.Printf("%v->%v 字段值:%v", total, i, match[1])

                userInfoArray := strings.Split(userInfo, "|")
                userAllInfo = append(userInfoArray, dataString)
                if strings.Trim(userInfoArray[1], " ") == "男" || strings.Trim(userInfoArray[3], " ") == "大专" {
                    c.Move(seqSet, "Resume")
                }
            } else {
                log.Println("未找到匹配的字段")
            }

            re1 := regexp.MustCompile(`(?s)href="([^"]*)"`)
            match1 := re1.FindStringSubmatch(htmlContent)
            var url string
            if len(match1) > 1 {
                url = match1[1]
                log.Debugf("URL:%v", url)
            } else {
                log.Warn("未找到匹配的 URL")
            }

            err2 := WriterCsv.Write(append(userAllInfo, url))
            if err2 != nil {
                log.Error("WriterCsv写入文件失败")
            }
            WriterCsv.Flush() //刷新，不刷新是无法写入的

        case *mail.AttachmentHeader:
            // This is an attachment
            filename, _ := h.Filename()
            log.Printf("Attachment: %v", filename)
        }
    }

    if err := fetchCmd.Close(); err != nil {
        log.Fatalf("FETCH command failed: %v", err)
    }
}

emersion / go-imap

FETCH command did not return any message #617