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pageauc / pi-timolo

Raspberry PI-TIMOLO ( PI-TImelapse, MOtion, LOwLight ) uses RPI picamera and OpenCV for Remote Headless Security Monitoring using Motion Tracking, Rclone Auto Sync files with remote storage services. Auto Twilight Transitions and Low Light Camera Settings. Panoramic images using PanTiltHat and More. This project is featured on GitHub Awesome software.
MIT License
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webserver.py not starting? #26

Closed Monongahela closed 7 years ago

Monongahela commented 7 years ago

Hello Claude, I'm having an issue getting webserver.py to start and then continue running on the RPi 3. I've installed your latest release from December 14. Running ./webserver.py on the CLI reports "webserver.py is Running" and returns the PID. But netstat -tln can not find a server listening on port 8080 (but does find SSH on port 22), and pgrep can not find the PID that was returned by the webserver.py script. Attempts to reach the RPi at port 8080 from a browser on any other machine on my local network are met with the message "Connection Refused".

Any ideas on the cause, or recommendations to fix this?

Thank you, Mono

pageauc commented 7 years ago

You need to check that ./webserver.py runs on it's own without failing otherwise webserver.sh will not show any errors if webserver.py fails. I suggest you run

./webserver.py

From you description it looks like you have done this.

See if there are any error messages webserver.py console messages. Note you cannot ctrl-c or end the terminal session when this is running since it will stop the webserver port from opening. The webserver should be accessible on a web browser via the ip and specified port and web activity will be shown in the console or terminal session that is running pi-timolo.py. It appears that nothing else is using port 8080. You could always try another port eg 8081, 8090 or similar

Open a second terminal session and type

pgrep -f webserver,py

to check if the webserver.py started OK. A pid number will be returned if it is running OK. pgrep -f parameter looks at the complete command since the primary command is python and webserver.py is a parameter. You can always do a

ps -ef

to see all processes and look for python webserver.py

If webserver.py fails then review the error message, correct the problem and try again. Usually it would be a misconfigured variable setting in webserver.py. Use nano to edit webserver.py file variables if that is the problem.

Make sure you are not running under python3. I get a ImportError: No module named 'SocketServer' error if I try to run python3 webserver.py

If ./webserver.py appears to run OK then the problem may be with the network, router of a windows firewall setting, Etc. It may be possible that another machine has the same IP address as the RPI. This can sometimes happen if you configure a fixed IP address in the same range as the router DHCP scope. I have actually had this problem on a network. I usually run fring on my ipod to check ip and hosts on my network since I have some devices with fixed IP's and also the router will sometimes change a DHCP ip address for one of my RPI's that I am trying to SSH, filezilla, mobaxterm or VNC to.

Other than a port being blocked (by RPI, Browser, OS firewall, or used by another process, misconfigured webserver.py variable, permissions or network issue that is the only things I can think of. I have run this on quite a few RPI's with different Raspbian versions and hardware vintages without problem.

Let me know how you make out. I am thinking something either the client OS, or browser is blocking a port. I would be interested and would document issue for others.

FYI I run chrome browser on Windows 7 so not sure about other combinations.

Thanks Claude ...

On Tue, Dec 20, 2016 at 8:29 PM, Monongahela notifications@github.com wrote:

Hello Claude, I'm having an issue getting webserver.py to start and then continue running on the RPi 3. I've installed your latest release from December 14. Running ./webserver.py on the CLI reports "webserver.py is Running" and returns the PID. But netstat -tln can not find a server listening on port 8080 (but does find SSH on port 22), and pgrep can not find the PID that was returned by the webserver.py script. Attempts to reach the RPi at port 8080 from a browser on any other machine on my local network are met with the message "Connection Refused".

Any ideas on the cause, or recommendations to fix this?

Thank you, Mono

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Monongahela commented 7 years ago

Thanks for the response Claude. I discovered the problem, and it was a newb mistake. I clobbered the webserver.py file when I installed it. Downloaded a fresh install and now it starts fine. But now I'm seeing a new issue. When I try to connect to the webserver at port 8080 from my client, I get a long list of error messages apparently thrown from python. Here's a snippet of what I'm seeing:

Exception happened during processing of request from ('10.0.0.10', 35946) Traceback (most recent call last): File "/usr/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock self.process_request(request, client_address) File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request self.finish_request(request, client_address) File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request self.RequestHandlerClass(request, client_address, self) File "/usr/lib/python2.7/SocketServer.py", line 655, in init self.handle() File "/usr/lib/python2.7/BaseHTTPServer.py", line 340, in handle self.handle_one_request() File "/usr/lib/python2.7/BaseHTTPServer.py", line 328, in handle_one_request method() File "/usr/lib/python2.7/SimpleHTTPServer.py", line 44, in do_GET f = self.send_head() File "/usr/lib/python2.7/SimpleHTTPServer.py", line 83, in send_head return self.list_directory(path) File "./webserver.py", line 93, in list_directory % (list[1], web_page_title)) IndexError: list index out of range

Could this be an issue with the version of python I'm running?

Thank you, Mono

pageauc commented 7 years ago

Looks like you have No jpg files in the web server root folder or the pi user cannot access them. I did a quick test on an empty folder and got the same error message. Try putting more than two jpg images in the folder. Edit the variable web_server_root to point to the folder containing the images. Otherwise it should work OK.

See my wiki here https://github.com/pageauc/pi-timolo/wiki/Utilities

Let me know how you make out. You can have folders in folders and the webserver will navigate them but create a tab for each new folder. Just close the tabs as required since you cannot navigate backwards in the tabs.

Let me know how you make out

On Wed, Dec 21, 2016 at 2:53 PM, Monongahela notifications@github.com wrote:

Thanks for the response Claude. I discovered the problem, and it was a newb mistake. I clobbered the webserver.py file when I installed it. Downloaded a fresh install and now it starts fine. But now I'm seeing a new issue. When I try to connect to the webserver at port 8080 from my client, I get a long list of error messages apparently thrown from python. Here's a snippet of what I'm seeing:

Exception happened during processing of request from ('10.0.0.10', 35946) Traceback (most recent call last): File "/usr/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock self.process_request(request, client_address) File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request self.finish_request(request, client_address) File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request self.RequestHandlerClass(request, client_address, self) File "/usr/lib/python2.7/SocketServer.py", line 655, in init self.handle() File "/usr/lib/python2.7/BaseHTTPServer.py", line 340, in handle self.handle_one_request() File "/usr/lib/python2.7/BaseHTTPServer.py", line 328, in handle_one_request method() File "/usr/lib/python2.7/SimpleHTTPServer.py", line 44, in do_GET f = self.send_head() File "/usr/lib/python2.7/SimpleHTTPServer.py", line 83, in send_head return self.list_directory(path) File "./webserver.py", line 93, in list_directory % (list[1], web_page_title)) IndexError: list index out of range

Could this be an issue with the version of python I'm running?

Thank you, Mono

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Monongahela commented 7 years ago

Yes, that was it. web_server_root was pointing to "motion" and I was capturing everything in the timelapse folder. I stopped the webserver with webserver.sh stop, edited webserver.py to point to the correct root folder, then started the webserver with webserver.sh start. Then pointed my browser to the ipaddress:8080 and it came right up.

Thanks for your patience. Mono

pageauc commented 7 years ago

Please note there is a setting to limit the max number of files to show in the right pane listing. This feature works better if sorted by date descending (default) or by filename if named by number not date. That way you can browse the last 100 .. 200 or so images Up to 500 works OK as well, Note with a long list you may want to turn off refresh or set to a longer time period. Default is 120 seconds. Also you can setup a second web server by copying the existing webserver.py and sh to another name eg webserver-mo.py and sh. Change the web_server_root and port number different from the first one. You can then have two web servers pointing at two locations if you wish.

Claude ...

On Wed, Dec 21, 2016 at 7:24 PM, Monongahela notifications@github.com wrote:

Yes, that was it. web_server_root was pointing to "motion" and I was capturing everything in the timelapse folder. I stopped the webserver with webserver.sh stop, edited webserver.py to point to the correct root folder, then started the webserver with webserver.sh start. Then pointed my browser to the ipaddress:8080 and it came right up.

Thanks for your patience. Mono

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Monongahela commented 7 years ago

Great suggestions, thanks. I'll give them a go.

Mono

pageauc commented 7 years ago

Just did some testing with other files besides jpg. If I create a folder and put txt, html or other similar files in the folder, then you can create a sub web server. When you click on the folder the list of files is displayed. html files only seem to work locally, no access to internet. If you have an index.html then no right pane is displayed and the index.html takes up the whole page. You could use this for looking at txt, html or other types of files. besides jpg. I tried putting a Readme.md file in and it did not recognize it but did pull up download window. I have not tried javascript yet.

See wiki here https://github.com/pageauc/pi-timolo/wiki/Access-images-via-webserver

Claude ...

On Thu, Dec 22, 2016 at 6:27 AM, Monongahela notifications@github.com wrote:

Great suggestions, thanks. I'll give them a go.

Mono

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Monongahela commented 7 years ago

Great, thank you Claude. Keep up the good work. It will be interesting to see where you can go with this.

Mono