Convert HTML to PDF

Marcus Barnet

At the moment, I solved the conversion problem by using wkhtmltopdf.

However, I was trying to generated a PDF file to be able to send it by email as an attachment since sometimes the HTML webpages are blocked by the antivirus (I guess) and they cannot be read by the user.
I was thinking to solve the problem by sending PDF files instead of HTML, but the attachments keep to be blocked on some smartphones!!

artwaw

@Marcus-Barnet That, I believe, is a problem with settings of the said smartphone mail client or account and I am not sure if you can do anything to prevent that.
Ugly solution might be to ditch pdf and render a4 size png image and include that as an attachment (but I am totally not sure if that would work with mail filters).

Marcus Barnet

But it's strange because if I sent the same PDF file as attachment by using my mail client, then they receive it.

The problem occurs only when I send it by my QT application.

artwaw

@Marcus-Barnet I'd examine headers set by mail client and by Qt code.

Marcus Barnet

Following your suggestion, I tried to compare both mail headers, but they look almost similar to me even if the email client seems to convert the mail text to HTML.

This is the header for the email sent by the QT code:

Delivered-To: email@gmail.com
Received: by 2002:a05:6838:e2d1:0:0:0:0 with SMTP id h17csp4107691nke;
        Tue, 15 Jun 2021 13:31:50 -0700 (PDT)
X-Received: by 2002:a17:906:60d3:: with SMTP id f19mr1464991ejk.413.1623789110147;
        Tue, 15 Jun 2021 13:31:50 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1623789110; cv=none;
        d=google.com; s=arc-20160816;
        b=I/NjJ997YuEPNSd5GreiyadlkrHD6KyDjm8ZkJnuZCQxGo/gNdi87wj76UVwQ4PxOT
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         xiDIJtJ5z3yi1CMi++EIypHP0VxEBPnyUnLkmphJKVNrBgw4QtLV+OCwjFvFMRuxoMU9
         409Q==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=content-transfer-encoding:mime-version:subject:to:from:date
         :message-id:dkim-signature;
        bh=0BZEuUGVIISL9vh2ZiCAePOWEZJm2fk4iWTEHYb3Klg=;
        b=ujrXD41yE3z9gtDpIc1nAkzU2dKdMpJOSDCYDVJnkfz1NN5IAc8/1u19cqBcmotVr1
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         iWvw==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@gmail.com header.s=20161025 header.b="V/05G+hO";
       spf=pass (google.com: domain of email@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=pumpasdmaglie@gmail.com;
       dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com
Return-Path: <pumpasdmaglie@gmail.com>
Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41])
        by mx.google.com with SMTPS id e22sor17653647edu.23.2021.06.15.13.31.49
        for <email@gmail.com>
        (Google Transport Security);
        Tue, 15 Jun 2021 13:31:50 -0700 (PDT)
Received-SPF: pass (google.com: domain of pumpasdmaglie@gmail.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41;
Authentication-Results: mx.google.com;
       dkim=pass header.i=@gmail.com header.s=20161025 header.b="V/05G+hO";
       spf=pass (google.com: domain of pumpasdmaglie@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=pumpasdmaglie@gmail.com;
       dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20161025;
        h=message-id:date:from:to:subject:mime-version
         :content-transfer-encoding;
        bh=0BZEuUGVIISL9vh2ZiCAePOWEZJm2fk4iWTEHYb3Klg=;
        b=V/05G+hOVQajWYay+THCyOZe2XcQSCy1Eqw8ePT6dmHGPYurnxR3dO5cmmhEg/+4du
         L4aptWvFiYKaDVZJvsCFgDphUtxxTQFBfFNWadVkzHAErBfesOehucMnz8vdaPkyI1hA
         ekP2h2QuKy5/gRpOfTVqQg5nVtFz0EtY3AlYMY16bYMMgXgURnD5MqsFo5KFBSApG+VD
         kejb3RIw6zyT+ubNJGrxkoxXJ1052qKFtx1o0Hhufh6tUyrhveuIuWyH+C/mvr1mZcKk
         d/Fu1qw4oXqW0wYyRqEsoSt2V7f03ikLnfmSyxDTwBZVIz/AMNwQ68+3lqL5PCbN+rpy
         y9mQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:message-id:date:from:to:subject:mime-version
         :content-transfer-encoding;
        bh=0BZEuUGVIISL9vh2ZiCAePOWEZJm2fk4iWTEHYb3Klg=;
        b=CaoucRugLcRefZOqgUIdai4QXz6pGPXJc17BaqgLs47RwaIIobYisIRzy2jXOZ/y95
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         WZDg==
X-Gm-Message-State: AOAM5336ea21u4HeweqqAnDrAKtdifUHCW0lwdshpt7j9cFUDoXJ7Q0n t0/0cqpmokCIawJXCH1HzRGnWx9G7Fk=
X-Google-Smtp-Source: ABdhPJx4U1C4HLk0WphjdL7Fk16b4PcnBlPBDBVfMInuYYRW06oVvuk7/XEem9l8F01eEWwq85Q+0Q==
X-Received: by 2002:aa7:c799:: with SMTP id n25mr22902eds.16.1623789109691;
        Tue, 15 Jun 2021 13:31:49 -0700 (PDT)
Return-Path: <pumpasdmaglie@gmail.com>
Received: from localhost (host-87-0-192-249.retail.telecomitalia.it. [87.0.192.249])
        by smtp.gmail.com with ESMTPSA id i26sm37044edq.54.2021.06.15.13.31.48
        for <roccogalati@gmail.com>
        (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256);
        Tue, 15 Jun 2021 13:31:48 -0700 (PDT)
Message-ID: <60c90e34.1c69fb81.70a57.0267@mx.google.com>
Date: Tue, 15 Jun 2021 13:31:48 -0700 (PDT)
X-Google-Original-Date: 15 Jun 2021 22:31:51 +0200
From: Palestra PUMP <email@gmail.com>
To: "Galati Rocco #1000" <email@gmail.com>
Subject: La tua tabella di allenamento!
MIME-Version: 1.0
Content-Type: multipart/related; boundary=9371d7a2e3ae86a00aab4771e39d255d
Content-Transfer-Encoding: 8bit
X-Antivirus: Avast (VPS 210615-4, 15/06/2021), Outbound message
X-Antivirus-Status: Clean

--9371d7a2e3ae86a00aab4771e39d255d
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

Ciao Rocco,

in allegato, trovi la tua tabella di allenamento.



A presto, la tua palestra PUMP!










In ottemperanza al D.lgs. 196/03 e al Regolamento UE 2016/679 in materia di protezione dei dati personali, le informazioni ivi contenute hanno natura strettamente personale e sono indirizzate esclusivamente al destinatario indicato. Qualora abbia ricevuto questa e-mail per errore, La invito cortesemente ad avvertire immediatamente il mittente e a distruggere il presente messaggio.

-- 
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

--9371d7a2e3ae86a00aab4771e39d255d
Content-Type: application/pdf; name="scheda-2021-06-15-22-31-43.pdf"
Content-Transfer-Encoding: base64
Content-disposition: attachment


--9371d7a2e3ae86a00aab4771e39d255d--

and this is the email sent by the mail client:

Delivered-To: email@gmail.com
Received: by 2002:a05:6838:e2d1:0:0:0:0 with SMTP id h17csp4110240nke;
        Tue, 15 Jun 2021 13:35:41 -0700 (PDT)
X-Received: by 2002:a05:6402:885:: with SMTP id e5mr21738edy.248.1623789341141;
        Tue, 15 Jun 2021 13:35:41 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1623789341; cv=none;
        d=google.com; s=arc-20160816;
        b=WPDMLTDvj3pUZz8WTQHgDSA0aSHtNqt6HDwt9YSPaaVo52sQcXHqyaCoXA9k/OZ8M3
         HV4JLvW2idM4SJfQIBKpzeWFp5GmYt0fKUFRlBq0w+u2s4Q538NmOkCU50WKXhYOxG3c
         HE6+QbH63kZ/LdTbBd85YRWCMc3YAMa8qcwzDcO9QDmnbsH79LkgrOPzQ40l3NnMarGq
         kDYtp1zUYWADyW3CzwwjwhfHh3YfHH9TrmbA3iI4XZ2g110OstjpAV+CNFLuO7JKHGZy
         U1sjnoKk7LTG9Vw4Uf81Pk40neQ4Gt8JXLK4xCTlU7l6zF+NPzS9LP48rPJwG1Xm+Q8y
         /qyA==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=to:subject:message-id:date:from:mime-version:dkim-signature;
        bh=uqwG0qx8RbPz4mcP+T2OrqWbpBbaghEYmb/ZCpcY2vk=;
        b=BIpf2/QIJTZ4Awlg4lgo7M6KV/UcY43OrD0DDfCQ5WKpZ0VZphy3TKwm6nfgyF2jwz
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         DkaA==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@gmail.com header.s=20161025 header.b=KoNBYb9O;
       spf=pass (google.com: domain of email@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=pumpasdmaglie@gmail.com;
       dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com
Return-Path: <email@gmail.com>
Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41])
        by mx.google.com with SMTPS id k5sor17978824edo.16.2021.06.15.13.35.41
        for <email@gmail.com>
        (Google Transport Security);
        Tue, 15 Jun 2021 13:35:41 -0700 (PDT)
Received-SPF: pass (google.com: domain of email@gmail.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41;
Authentication-Results: mx.google.com;
       dkim=pass header.i=@gmail.com header.s=20161025 header.b=KoNBYb9O;
       spf=pass (google.com: domain of email@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=email@gmail.com;
       dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20161025;
        h=mime-version:from:date:message-id:subject:to;
        bh=uqwG0qx8RbPz4mcP+T2OrqWbpBbaghEYmb/ZCpcY2vk=;
        b=KoNBYb9OMgICs8aVqPKjMbNT6kIV9Y8ymAzFoTFNdBu7wj/8ZVm00QAgSL6cmxDyuv
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         ICRw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
        bh=uqwG0qx8RbPz4mcP+T2OrqWbpBbaghEYmb/ZCpcY2vk=;
        b=bDt6NmLZQsLItATHtLI8AJY8P7ogosAcdeFuBQHFE8Ih6wgx7LiEFzmitfTk5RPo62
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         LUDqIKQOR3oKglJboq5Cyy3q5fqPoRxhZ1KNMRImf/e/nhNCjWvQf73TlN0RPGPazOok
         8PBq0fzPsuuVSXdqYL2ajoTQGbzooCfBt53eUquPQFEsFBYzYutw4JCduNPQk5xaVnNJ
         zYPw==
X-Gm-Message-State: AOAM532ThjqQDukcTP//RzC6elrP/3mb9JMq5ZO1ed8ZxRapAb5rJpEW +6qdTP1A0zPMS5yMNbBG8a+PmCp8HTJ27zWTR97mlMvh4le/Jw==
X-Google-Smtp-Source: ABdhPJy13k4Xks3LltxmtgA/rFwjgGZVjEZxPu5X13JcMAxOpeYX7GMioaiRuxwobLeXrt0e/IPHZW4SSPccf6VNf9E=
X-Received: by 2002:a05:6402:1a25:: with SMTP id be5mr1657285edb.369.1623789340788; Tue, 15 Jun 2021 13:35:40 -0700 (PDT)
MIME-Version: 1.0
From: Palestra PUMP <email@gmail.com>
Date: Tue, 15 Jun 2021 22:35:32 +0200
Message-ID: <CAPs+xw-RQ34QHM3wH6JcNmWLUX67sbgT3VtyjCEsNShJVA9KuQ@mail.gmail.com>
Subject: La tua tabella di allenamento!
To: Rocco Galati <email@gmail.com>
Content-Type: multipart/mixed; boundary="000000000000d931fb05c4d3ead5"

--000000000000d931fb05c4d3ead5
Content-Type: multipart/alternative; boundary="000000000000d931fa05c4d3ead3"

--000000000000d931fa05c4d3ead3
Content-Type: text/plain; charset="UTF-8"

Ciao MARCO,

in allegato, trovi la tua tabella di allenamento.



A presto, la tua palestra PUMP!










In ottemperanza al D.lgs. 196/03 e al Regolamento UE 2016/679 in materia di
protezione dei dati personali, le informazioni ivi contenute hanno natura
strettamente personale e sono indirizzate esclusivamente al destinatario
indicato. Qualora abbia ricevuto questa e-mail per errore, La invito
cortesemente ad avvertire immediatamente il mittente e a distruggere il
presente messaggio.

<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
Virus-free.
www.avast.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

--000000000000d931fa05c4d3ead3
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Ciao MARCO,<br><br>in allegato, trovi la tua tabella di al=
lenamento.<br><br><br><br><br><br>A presto, la t=
ua palestra PUMP!<br><br><br><br><br><br><br><br><br><br><br>In ottemperanz=
a al D.lgs. 196/03 e al Regolamento UE 2016/679 in materia di protezione de=
i dati personali, le informazioni ivi contenute hanno natura strettamente p=
ersonale e sono indirizzate esclusivamente al destinatario indicato. Qualor=
a abbia ricevuto questa e-mail per errore, La invito cortesemente ad avvert=
ire immediatamente il mittente e a distruggere il presente messaggio.<br></=
div><div id=3D"DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
<table style=3D"border-top:1px solid #d3d4de">
=09<tr>
        <td style=3D"width:55px;padding-top:13px"><a href=3D"https://www.av=
ast.com/sig-email?utm_medium=3Demail&amp;utm_source=3Dlink&amp;utm_campaign=
=3Dsig-email&amp;utm_content=3Dwebmail" target=3D"_blank"><img src=3D"https=
://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-n=
o-repeat-v1.gif" alt=3D"" width=3D"46" height=3D"29" style=3D"width: 46px; =
height: 29px;"></a></td>
=09=09<td style=3D"width:470px;padding-top:12px;color:#41424e;font-size:13p=
x;font-family:Arial,Helvetica,sans-serif;line-height:18px">Virus-free. <a h=
ref=3D"https://www.avast.com/sig-email?utm_medium=3Demail&amp;utm_source=3D=
link&amp;utm_campaign=3Dsig-email&amp;utm_content=3Dwebmail" target=3D"_bla=
nk" style=3D"color:#4453ea">www.avast.com</a>
=09=09</td>
=09</tr>
</table><a href=3D"#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width=3D"1" heigh=
t=3D"1"></a></div>

--000000000000d931fa05c4d3ead3--
--000000000000d931fb05c4d3ead5
Content-Type: application/pdf; name="scheda-2021-06-15-22-31-43.pdf"
Content-Disposition: attachment; filename="scheda-2021-06-15-22-31-43.pdf"
Content-Transfer-Encoding: base64
Content-ID: <f_kpyi8e5m0>
X-Attachment-Id: f_kpyi8e5m0


--000000000000d931fb05c4d3ead5--

artwaw

@Marcus-Barnet said in Convert HTML to PDF:
Content-Type: multipart/related; vs Content-Type: multipart/mixed;

There are also differences in Return-Path header but I assume this is due to not full obfuscation on your part?

I'll need to verify with google docs if this makes any difference (Content-Type), I really don't know from the top of my head.

Marcus Barnet

I was able to find nothing related to this problem!
The attachment part seems to be similar to both cases and also the base64 encoded content.

MrShawn

@Marcus-Barnet said in Convert HTML to PDF:

Thank you! Yes, I could try! I have all the html code store into a QString html_page variable.
What is the fastest way to convert it to QTextDocument?
QTextDocument doc;
doc.setHtml(html_page );

The web page is formatted to fit in a A4 format as it is.
I couldn't find any simple code to understand how to use QPdfWriter, by the way!

Did this not work for you?

In a program I did quickly to help with POs I generate HTML with the given info. that is stored in a QString called "html"

            QTextDocument document;
            document.setHtml(html);

            QPrinter printer(QPrinter::PrinterResolution);
            printer.setOutputFormat(QPrinter::PdfFormat);
            printer.setPaperSize(QPrinter::A4);
            printer.setOutputFileName(QStandardPaths::writableLocation(QStandardPaths::DesktopLocation) + "/" + po.purchaseOrderNumber() + ".pdf");
            printer.setPageMargins(QMarginsF(15, 15, 15, 15));

            document.print(&printer);

that puts the PO on the desktop for me.

artwaw

@Marcus-Barnet So I did my research and content-type variations should not have any impact. I am afraid that is as far as I can help you with emailing.

Marcus Barnet

@artwaw said in Convert HTML to PDF:

@Marcus-Barnet So I did my research and content-type variations should not have any impact. I am afraid that is as far as I can help you with emailing.

I did other tests, too, and I also contacted the author of the SMTP library, but at the end, it seems that the problem is not easy to solve.
As a workaround, I added a simple text in the email saying something like: "Id you do not see the attachment, please read this email from your webmail or your mail client".

Thank you for your help, @artwaw

david6

This post is deleted!

daratmp

This post is deleted!

HiQPdf Software

It’s a good head start!

HiQPdf Software

@HiQPdf-Software