Re: [weewx-user] Re: Copy webcam image to /var/www/html/weewx/image.jpg

Mon, 23 Nov 2020 08:03:44 -0800 

hello,
here, what I did to capture a video image and put it on the RPi server with the belchertown skin. I used an intermediate server, here a NAS. (freeNas). 
1- Samsung Camera ----> FTP ----> Freenas.
2 - SCP transfer from RPi (weewx) ---> FreeNas -> / home / pi / transfer-images / "capture name" 
3 - script to rename "capture name" ---> new name.jpg
4- cp "new name.jpg" ---> / var / www / html / weewx / belchertown / images / 
5- to automate everything, this I created a batch that I put in crontab.

Patrick

Le 23/11/2020 à 15:35, Greg Sinclair a écrit :
I do this by doing all the processing on the Pi capturing the image and then doing a sftp to place the image where weewx can find it. 

Greg

On Sunday, November 22, 2020 at 1:47:33 PM UTC-6 Rich Strle wrote:

    Thanks very much Vince.

    I appreciate your advice on the Linux Fundamentals course.

    Rich Strle
    309-824-9213 <tel:(309)%20824-9213>

    On Sun, Nov 22, 2020 at 12:34 PM vince <[email protected]> wrote:
    >
    > On Sunday, November 22, 2020 at 8:44:01 AM UTC-8 Rich Strle wrote:
    >>
    >> Looking at my passwrd file I see:
    www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
    >> Would I remove the /nologin?
    >>
    >
    > Please don't do that.
    >
    > www-data is the owner of the web 'data' and your webserver
    process likely runs as that user.
    > The nologin there ensures that if anybody/anything breaks
    security on your webserver running process, then they still
    wouldn't be able to get a shell and install/run malware etc.
    >
    > What you want to do is:
    >
    > put all your processing in a script
    > run that script as the non-privileged user 'pi' and write to
    scratch directories that pi can write to (/tmp or /var/tmp are
    likely places)
    > in your script, do the 'privileged' copy of the output file to
    the /var/www/html directory by prefacing your 'cp' command ala
    'sudo cp'
    > and you'll likely want to set the permissions on the file in
    /var/www/html also with 'sudo chmod'
    >
    > (standard suggestion - if you're asking this you need to up your
    linux-fu a little - I always suggest looking at the free edx.org
    <http://edx.org> Linux Fundamentals course that literally a
    million folks have taken)
    >
    > A simple script that grabs Google's logo image as an example
    would look something like:
    >
    > #!/bin/bash
    >
    
UPSTREAM_URL="https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png
    
<https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png>"

    > SCRATCH_FILE="/tmp/image.jpg"
    > FINAL_OUTPUT="/var/www/html/image.jpg"
    >
    > # wget the file in quiet mode to a temporary location
    > wget -q "${URL}" "${SCRATCH_FILE}"
    >
    > # copy it into place and fix up permissions via sudo
    > sudo cp "${SCRATCH_FILE}" "${FINAL_OUTPUT}"
    > sudo chown www-data "${FINAL_OUTPUT}"
    > sudo chmod 644 "${FINAL_OUTPUT}"
    >
    > This script did the right thing for me, FWIW. You'll of course
    have to put in the right wget switches to grab your image from the
    camera, as well as doing any processing with ImageMagick etc.
    before you copy your image into the web tree, but this should give
    you a skeleton to start with that does the permission stuff...
    >
    >
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