How to load large local files using JavaScript?
Is there a way to handle very large files(like 2GB and over) locally in JavaScript without crashing the browser?
*I am aware of the input tag and the FileReader API, but it seems there is nothing like Node.js streams.
javascript file blob local filereader
asked Nov 10 '18 at 9:57
Damien Golding
3642521
|
show 3 more comments
Is there a way to handle very large files(like 2GB and over) locally in JavaScript without crashing the browser?
*I am aware of the input tag and the FileReader API, but it seems there is nothing like Node.js streams.
javascript file blob local filereader
asked Nov 10 '18 at 9:57
Damien Golding
3642521
1
What exactly are you planning on doing with this file? Just curious.
– SiddAjmera
Nov 10 '18 at 10:04
This is mainly hypothetical for future development at the moment, but the reason I thought of asking this question was because of wanting to extract data from a dump of my Google data. Obviously, any kind of functionality I would use this for is to extract a smaller amount of data at once such as "find all dates when I am at specific location".
– Damien Golding
Nov 10 '18 at 10:07
Any reason why you would be asking js to strain under a job that serverside would find trivial?
– lucas
Nov 10 '18 at 10:17
@lucas No network upload so reduces data costs + can be done on slow network environments. Users can share the processing burden instead of having the server owner burden the load of everyone using the service. Don't like uploading private data to external server.
– Damien Golding
Nov 10 '18 at 10:28
You can offload your long running task (large file handling in this case) to Web Workers (developer.mozilla.org/en-US/docs/Web/API/Worker). The web worker runs within another thread (context) therefore it won't block your main thread (browser)
– meteorzero
Nov 10 '18 at 11:48
|
show 3 more comments
Is there a way to handle very large files(like 2GB and over) locally in JavaScript without crashing the browser?
*I am aware of the input tag and the FileReader API, but it seems there is nothing like Node.js streams.
javascript file blob local filereader
asked Nov 10 '18 at 9:57
Damien Golding
3642521
Is there a way to handle very large files(like 2GB and over) locally in JavaScript without crashing the browser?
*I am aware of the input tag and the FileReader API, but it seems there is nothing like Node.js streams.
javascript file blob local filereader
javascript file blob local filereader
asked Nov 10 '18 at 9:57
Damien Golding
3642521
asked Nov 10 '18 at 9:57
Damien Golding
3642521
asked Nov 10 '18 at 9:57
Damien Golding
3642521
asked Nov 10 '18 at 9:57
Damien Golding
3642521
asked Nov 10 '18 at 9:57
Damien Golding
3642521
3642521
1
What exactly are you planning on doing with this file? Just curious.
– SiddAjmera
Nov 10 '18 at 10:04
This is mainly hypothetical for future development at the moment, but the reason I thought of asking this question was because of wanting to extract data from a dump of my Google data. Obviously, any kind of functionality I would use this for is to extract a smaller amount of data at once such as "find all dates when I am at specific location".
– Damien Golding
Nov 10 '18 at 10:07
Any reason why you would be asking js to strain under a job that serverside would find trivial?
– lucas
Nov 10 '18 at 10:17
@lucas No network upload so reduces data costs + can be done on slow network environments. Users can share the processing burden instead of having the server owner burden the load of everyone using the service. Don't like uploading private data to external server.
– Damien Golding
Nov 10 '18 at 10:28
You can offload your long running task (large file handling in this case) to Web Workers (developer.mozilla.org/en-US/docs/Web/API/Worker). The web worker runs within another thread (context) therefore it won't block your main thread (browser)
– meteorzero
Nov 10 '18 at 11:48
|
show 3 more comments
1
What exactly are you planning on doing with this file? Just curious.
– SiddAjmera
Nov 10 '18 at 10:04
This is mainly hypothetical for future development at the moment, but the reason I thought of asking this question was because of wanting to extract data from a dump of my Google data. Obviously, any kind of functionality I would use this for is to extract a smaller amount of data at once such as "find all dates when I am at specific location".
– Damien Golding
Nov 10 '18 at 10:07
Any reason why you would be asking js to strain under a job that serverside would find trivial?
– lucas
Nov 10 '18 at 10:17
@lucas No network upload so reduces data costs + can be done on slow network environments. Users can share the processing burden instead of having the server owner burden the load of everyone using the service. Don't like uploading private data to external server.
– Damien Golding
Nov 10 '18 at 10:28
You can offload your long running task (large file handling in this case) to Web Workers (developer.mozilla.org/en-US/docs/Web/API/Worker). The web worker runs within another thread (context) therefore it won't block your main thread (browser)
– meteorzero
Nov 10 '18 at 11:48
1
1
What exactly are you planning on doing with this file? Just curious.
– SiddAjmera
Nov 10 '18 at 10:04
What exactly are you planning on doing with this file? Just curious.
– SiddAjmera
Nov 10 '18 at 10:04
This is mainly hypothetical for future development at the moment, but the reason I thought of asking this question was because of wanting to extract data from a dump of my Google data. Obviously, any kind of functionality I would use this for is to extract a smaller amount of data at once such as "find all dates when I am at specific location".
– Damien Golding
Nov 10 '18 at 10:07
This is mainly hypothetical for future development at the moment, but the reason I thought of asking this question was because of wanting to extract data from a dump of my Google data. Obviously, any kind of functionality I would use this for is to extract a smaller amount of data at once such as "find all dates when I am at specific location".
– Damien Golding
Nov 10 '18 at 10:07
Any reason why you would be asking js to strain under a job that serverside would find trivial?
– lucas
Nov 10 '18 at 10:17
Any reason why you would be asking js to strain under a job that serverside would find trivial?
– lucas
Nov 10 '18 at 10:17
@lucas No network upload so reduces data costs + can be done on slow network environments. Users can share the processing burden instead of having the server owner burden the load of everyone using the service. Don't like uploading private data to external server.
– Damien Golding
Nov 10 '18 at 10:28
@lucas No network upload so reduces data costs + can be done on slow network environments. Users can share the processing burden instead of having the server owner burden the load of everyone using the service. Don't like uploading private data to external server.
– Damien Golding
Nov 10 '18 at 10:28
You can offload your long running task (large file handling in this case) to Web Workers (developer.mozilla.org/en-US/docs/Web/API/Worker). The web worker runs within another thread (context) therefore it won't block your main thread (browser)
– meteorzero
Nov 10 '18 at 11:48
You can offload your long running task (large file handling in this case) to Web Workers (developer.mozilla.org/en-US/docs/Web/API/Worker). The web worker runs within another thread (context) therefore it won't block your main thread (browser)
– meteorzero
Nov 10 '18 at 11:48
|
show 3 more comments
1 Answer
1
active
oldest
votes
FileReader enables you to read contents of files asynchronously. With respect to large file (2GB in your case), you can use function/method FileReader.readAsArrayBuffer() to read a certain chunk size of a file in the memory hence this won't crash your browser, this blog is a good example.
answered Nov 11 '18 at 10:26
meteorzero
436414
1
The important part here is theslice()method of Blob. readAsArrayBuffer will just crash the browser the same if you pass a too big Blob to it.
– Kaiido
Nov 11 '18 at 11:00
add a comment |
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1 Answer
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active
oldest
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active
oldest
votes
FileReader enables you to read contents of files asynchronously. With respect to large file (2GB in your case), you can use function/method FileReader.readAsArrayBuffer() to read a certain chunk size of a file in the memory hence this won't crash your browser, this blog is a good example.
answered Nov 11 '18 at 10:26
meteorzero
436414
1
The important part here is theslice()method of Blob. readAsArrayBuffer will just crash the browser the same if you pass a too big Blob to it.
– Kaiido
Nov 11 '18 at 11:00
add a comment |
FileReader enables you to read contents of files asynchronously. With respect to large file (2GB in your case), you can use function/method FileReader.readAsArrayBuffer() to read a certain chunk size of a file in the memory hence this won't crash your browser, this blog is a good example.
answered Nov 11 '18 at 10:26
meteorzero
436414
1
The important part here is theslice()method of Blob. readAsArrayBuffer will just crash the browser the same if you pass a too big Blob to it.
– Kaiido
Nov 11 '18 at 11:00
add a comment |
FileReader enables you to read contents of files asynchronously. With respect to large file (2GB in your case), you can use function/method FileReader.readAsArrayBuffer() to read a certain chunk size of a file in the memory hence this won't crash your browser, this blog is a good example.
answered Nov 11 '18 at 10:26
meteorzero
436414
FileReader enables you to read contents of files asynchronously. With respect to large file (2GB in your case), you can use function/method FileReader.readAsArrayBuffer() to read a certain chunk size of a file in the memory hence this won't crash your browser, this blog is a good example.
answered Nov 11 '18 at 10:26
meteorzero
436414
answered Nov 11 '18 at 10:26
meteorzero
436414
answered Nov 11 '18 at 10:26
meteorzero
436414
answered Nov 11 '18 at 10:26
meteorzero
436414
436414
1
The important part here is theslice()method of Blob. readAsArrayBuffer will just crash the browser the same if you pass a too big Blob to it.
– Kaiido
Nov 11 '18 at 11:00
add a comment |
1
The important part here is theslice()method of Blob. readAsArrayBuffer will just crash the browser the same if you pass a too big Blob to it.
– Kaiido
Nov 11 '18 at 11:00
1
1
The important part here is the
slice() method of Blob. readAsArrayBuffer will just crash the browser the same if you pass a too big Blob to it.– Kaiido
Nov 11 '18 at 11:00
The important part here is the
slice() method of Blob. readAsArrayBuffer will just crash the browser the same if you pass a too big Blob to it.– Kaiido
Nov 11 '18 at 11:00
add a comment |
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1
What exactly are you planning on doing with this file? Just curious.
– SiddAjmera
Nov 10 '18 at 10:04
This is mainly hypothetical for future development at the moment, but the reason I thought of asking this question was because of wanting to extract data from a dump of my Google data. Obviously, any kind of functionality I would use this for is to extract a smaller amount of data at once such as "find all dates when I am at specific location".
– Damien Golding
Nov 10 '18 at 10:07
Any reason why you would be asking js to strain under a job that serverside would find trivial?
– lucas
Nov 10 '18 at 10:17
@lucas No network upload so reduces data costs + can be done on slow network environments. Users can share the processing burden instead of having the server owner burden the load of everyone using the service. Don't like uploading private data to external server.
– Damien Golding
Nov 10 '18 at 10:28
You can offload your long running task (large file handling in this case) to Web Workers (developer.mozilla.org/en-US/docs/Web/API/Worker). The web worker runs within another thread (context) therefore it won't block your main thread (browser)
– meteorzero
Nov 10 '18 at 11:48