Am 14.05.2020 um 05:08 schrieb Stefan Adams:

> I'm certain you'll be able to accomplish this with M::UA. Can you share

Just to reduce complexity I changed everything to plain HTTP, so no SSL,
keys or certificates.


> what the HTML error produced is?

It is not really a normal error page, just a page from the UI. The most
relevant lines are these:
<p class="ErrorMsg">Invalid variable name.</p>
<p>Wiederholen Sie das Update oder starten Sie die FRITZ!Box neu.</p>
[German for: repeat the update(sic! I wanted to backup the box, not
update) or restart your FRITZ!Box]


> Can you share the output that you are comparing that you are noticing is so> 
> similar between curl and M::UA? You're using -v for curl. Also set the> 
> MOJO_CLIENT_DEBUG env variable to 1.

Here is what curl gives (with --trace-ascii):
=> Send header, 200 bytes (0xc8)
0000: POST /cgi-bin/firmwarecfg HTTP/1.1
0024: Host: fritz.box
0035: User-Agent: curl/7.58.0
004e: Accept: */*
005b: Content-Length: 370
0070: Content-Type: multipart/form-data; boundary=--------------------
00b0: ----565a580ebeb0c567
00c6:
=> Send data, 370 bytes (0x172)
0000: --------------------------565a580ebeb0c567
002c: Content-Disposition: form-data; name="sid"
0058:
005a: 4e240384c30c909d
006c: --------------------------565a580ebeb0c567
0098: Content-Disposition: form-data; name="ImportExportPassword"
00d5:
00d7: backup
00df: --------------------------565a580ebeb0c567
010b: Content-Disposition: form-data; name="ConfigExport"
0140:
0142:
0144: --------------------------565a580ebeb0c567--
<= Recv header, 17 bytes (0x11)
0000: HTTP/1.1 200 OK



> See how it works comparing curl to:> >    $ env MOJO_CLIENT_DEBUG=1 mojo get 
> -v -M POST -f sid=$SID -f> ImportExportPassword=$BAKPWD -f ConfigExport= 
> http> ://fritz.box/cgi-bin/firmwarecfg <http://fritz.box/cgi-bin/firmwarecfg> 
> <http://fritz.box/cgi-bin/firmwarecfg>

The empty ConfigExport parameter gets lost with this command and the
Content-Type is different:

-- Blocking request (http://fritz.box/cgi-bin/firmwarecfg)
-- Connect 7c84d2d7396d9d2ff9571982f73240cb (http://fritz.box:80)
-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
POST /cgi-bin/firmwarecfg HTTP/1.1\x0d
Content-Length: 48\x0d
User-Agent: Mojolicious (Perl)\x0d
Accept-Encoding: gzip\x0d
Content-Type: application/x-www-form-urlencoded\x0d
Host: fritz.box\x0d
\x0d
ImportExportPassword=backup&sid=4e240384c30c909d
-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)

-- Client <<< Server (http://fritz.box/cgi-bin/firmwarecfg)
HTTP/1.1 200 OK\x0d



With DEBUG on and my code (s. my original message and below) I get this:

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
POST /cgi-bin/firmwarecfg HTTP/1.1\x0d
Accept-Encoding: gzip, deflate\x0d
Content-Type: multipart/form-data; boundary=tyUPX\x0d
Accept: */*\x0d
Host: fritz.box\x0d
Content-Length: 230\x0d
User-Agent: Mojolicious (Perl)\x0d
\x0d
--tyUPX\x0d

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
Content-Disposition: form-data; name="ConfigExport"\x0d
\x0d

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
\x0d
--tyUPX\x0d

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
Content-Disposition: form-data; name="ImportExportPassword"\x0d
\x0d

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
backup
-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
\x0d
--tyUPX\x0d

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
Content-Disposition: form-data; name="sid"\x0d
\x0d

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
33cb272bcd34940b
-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)
\x0d
--tyUPX--\x0d

-- Client >>> Server (http://fritz.box/cgi-bin/firmwarecfg)

-- Client <<< Server (http://fritz.box/cgi-bin/firmwarecfg)
HTTP/1.1 200 OK\x0d

which for me looks very much the same as the curl version but as I said,
curl gives the backup file whereas M::U just gives the HTML page back,
indicating that something went wrong.
I can only spot very minor differences that is why I am running out of
ideas:
- the boundary used by M::U is quite short
- the form parameters are not in the same order
- Accept-Encoding header (is also sent from Firefox where it works)
- the different SID is normal (my script always makes a fresch login)

Looks very strange to me
-Michael


> On Wed, May 13, 2020, 4:56 PM 'Michael Lackhoff' via Mojolicious <> 
> mojolicious@googlegroups.com> wrote:> 

>> I had quite a bit of success recently using Mojo::UserAgent so I tried to>> 
>> replace a curl command to do a backup of my Fritz.box router with M::U.>>>> 
>> Here is the curl command:>> curl -s -k -o $OUT --form sid=$SID --form 
>> ImportExportPassword=$BAKPWD \>>         --form ConfigExport= 
>> http://fritz.box/cgi-bin/firmwarecfg>>>> It should be equivalent to this 
>> M::U request:>>>> my $tx = $ua->build_tx(>>     POST => 
>> 'http://fritz.box/cgi-bin/firmwarecfg' =>>>         {>>             'Accept' 
>>       => '*/*',>>             'Content-Type' => 'multipart/form-data',>>     
>>     } => form => {>>             sid                  => $SID,>>             
>> ImportExportPassword => $BAKPWD,>>             ConfigExport         => '',>> 
>>     }>> );>>>> # for debugging:>> print $tx->req->to_string;>>>> $tx = 
>> $ua->start($tx);>> $tx->res->save_to($OUT);>>>> As far as I can tell both 
>> the headers and the POST body is very much the>> same (except the boundary 
>> value to separate the form fields) but to my>> surprise the curl command 
>> works ($OUT is the backup file) but with the M::U>> version $OUT consists of 
>> some HTML output indicating an error.>>>> If I could see a difference I 
>> could try to better adjust my script but as>> I said, they look very much 
>> the same (I compared it with the -v and>> --trace-ascii output of curl), so 
>> I run out of ideas what could trigger the>> differnt response of my 
>> Fritz.box.>> Any ideas? At the moment I just solve it by using the curl 
>> command with>> "system" but I would prefer a Perl-only solution and what is 
>> even more>> important to me: I want to understand what is going on here.>>>> 
>> -Michael>>>> -->> You received this message because you are subscribed to 
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>> and stop receiving emails from it, send an>> email to 
>> mojolicious+unsubscr...@googlegroups.com.>> To view this discussion on the 
>> web visit>> 
>> https://groups.google.com/d/msgid/mojolicious/14df452c-e7a4-4b7c-90a2-9e1f5e15becc%40googlegroups.com>>
>>  
>> <https://groups.google.com/d/msgid/mojolicious/14df452c-e7a4-4b7c-90a2-9e1f5e15becc%40googlegroups.com?utm_medium=email&utm_source=footer>
>>  
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>>  .>>

> 

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