JS API: file size limits for file access?

[piet66]

Are there file size limits for file access using JS API, like
http:.../JS/Run/loadObject("filename")
and
http:.../JS/Run/saveObject("filename")
?

What are the limits and what do we get back when limit is exceeded?

[PoltoS]

Limit is the memory limit of your Pi. You get an exception if it is exceeded. Otherwise there are no limits.

But JSON is a bad format for big files

[piet66]

I tested loadObject with the standard ZWay files. 4 of them return null:
http://IP:8083/JS/Run/loadObject('dedevices.json')
http://IP:8083/JS/Run/loadObject('endevices.json')
http://IP:8083/JS/Run/loadObject('zwayo ... ckets.json')
http://IP:8083/JS/Run/loadObject('zwayp ... ckets.json')

These 4 are the largest files of all:
-rwxr-xr-x 1 4142694 Apr 19 13:49 dedevicesjson-b02fc6609e0022e8f55ff6bb5b853d35.json
-rwxr-xr-x 1 4103417 Apr 19 13:49 endevicesjson-7904daacdb872d656b01c6c9eddd3a48.json
-rwxr-xr-x 1 621220 Aug 11 08:31 zwayoriginPacketsjson-2ad2998bc2cb543d29ac586cec215398.json
-rwxr-xr-x 1 817011 Aug 11 08:31 zwayparsedPacketsjson-f1aed46af7fae1368e78db7768e4d9e5.json

For saveObject there seems to be a buffer size limit of about 6000 bytes. Larger buffers cause an error {"readyState":0,"status":0,"statusText":"error"}.

[PoltoS]

This should be HTTP limit and not API

[piet66]

Is it a limit of ZWay webserver? Where is it configured?

[piet66]

I tested loadObject with the standard ZWay files. 4 of them return null

It's not the filesize but the filename. After storing those file with a different valid filename it works.

Is it a limit of ZWay webserver? Where is it configured?

It's obviously the ZWay embedded webserver. I tested it with netcat.
Apache server also has such a limit: LimitRequestLine 8190

[PoltoS]

We should use mongoose default values

[piet66]

We should use mongoose default values

Of course, but I found it nowhere documented.
Now looked into mongoose code: #define MG_MAX_HTTP_REQUEST_SIZE 8192