anthony.minessale at gmail.com
Sun Jun 25 19:17:00 UTC 2017
On Sun, Jun 25, 2017 at 1:29 PM Raymond <xxxman2008 at 126.com> wrote:
> OK， firstly ，where's the new documentation of new V8 js module ?
Use the source luke. Maybe you can join the volunteer docs team and help
them. The module itself was donated by a community member.
> Secondly, I think, loop read small piece of file will cause too much
> I/O request . SO , i usually do read in following way.
> open the file ----> get file size --> read the whole file ( OS will charge
> the "one time " read size).
That is completely relevant to the size of the file and the size of the
chunk. There is no one answer.
> and in real-life , real-project , there's not so many big files. So, just
> open the file ,and read all. in 99.99% situation , it's safe.
Um, ok..... That does not sound very wise but sure. I'd say At least test
the size of the file first.
> in some situation , you cann't open the "incomplete file" , you even
> cann't "see" them. There's too much detail when we talk about file read
> ,we can discuss file-system in rest of our life.
> For Faruq , i think just read whole file is ok . if you warry about "incomplete
> file" ,just wait 1 second ,and read the file size again. it's may casuse
> delay ,but useful if you have lots of files to read .
> In my opinion, when linux do file read ,it read 1 block one time . A
> block is a sequence of bit or Bytes with a fixed length ie 512 bytes, 4kB,
> 8kB, 16kB, 32kB etc. So , please not use strange number as your read size.
> it's not a good idea. And ......I really hate "while (.....)" code ,it's
> really really bad.
Shaming coding constructs, in my opinion, is the path to mistakes. Every
code element exists for a reason and there is always a case for any of
them. I hate coding construct x is not helpful.
> At 2017-06-24 04:00:36, "Anthony Minessale" <anthony.minessale at gmail.com>
> That wiki documentation is from the old spidermonkey js module not the new
> v8 one.
> I believe that putting a very large number will not cause any problems as
> the data read cannot exceed the total bytes in the file so it should not be
> a problem.
> You can always do an append loop. Its usually a good practice to have a
> precise max size to read because what if the file was accidentally 2gb.
> On Fri, Jun 23, 2017 at 3:36 AM, Raymond <xxxman2008 at 126.com> wrote:
>> Hi ,
>> This will help you . https://wiki.freeswitch.org/wiki/File
>> At 2017-06-22 21:49:33, "Faruq Ahmad" <afarooqa at gmail.com> wrote:
>> I have a FS dialplan that fetches callflow from a JSON file. File is read
>> var JsonFd = new FileIO(JsonPath, 'r');
>> result = JsonFd.data();
>> var menu = JSON.parse(result),
>> Is there anyway I can read the whole file in one attempt, i.e. when a
>> smaller size was given to the .read() function it wouldn't read the
>> complete file. I have increased the value of size for read function however
>> my concern is in the long run file size might increase and parse would get
>> an incomplete JSON.
>> Is there anyway I can get filesize from FileIO object or detect EOF from
>> the read buffer to make sure the whole file is loaded?
>> Also if I increase the size for read fucntion buffer way over the
>> estimated filesizes, is there any guarantee that no garbage values will be
>> read from the disk after the EOF?
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> Official FreeSWITCH Sites
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
> Anthony Minessale II ♬ @anthmfs ♬ @FreeSWITCH ♬
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> Official FreeSWITCH Sites
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> FreeSWITCH-users at lists.freeswitch.org
Anthony Minessale II ♬ @anthmfs ♬ @FreeSWITCH ♬
☞ http://freeswitch.org/ ☞ http://cluecon.com/ ☞
☞ irc.freenode.net #freeswitch ☞ *http://freeswitch.org/g+
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