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Posted by E.T. Grey on 02/04/06 05:24
Jerry Stuckle wrote:
> E.T. Grey wrote:
>
>> Hi,
>>
>> I have an interesting problem. I have a (LARGE) set of historical data
>> that I want to keep on a central server, as several separate files. I
>> want a client process to be able to request the data in a specific
>> file by specifying the file name, start date/time and end date/time.
>>
>> The files are in binary format, to conserve space on the server (as
>> well as to increase processing time). The data in each file can be
>> quite large, covering several years of data. New data will be appended
>> to these files each day, by a (PHP) script. The server machine is
>> likely to be a Unix machine, whereas my clients will be running on
>> windows machines. My clients program is written in C++.
>>
>> My two main problems/questions are as follows:
>>
>> 1). Transfer method issue:
>> What is the best (i.e. most efficient and fast way) to transfer data
>> from the server to clients ?. I think SOAP is likely to be too slow,
>> because of the sheer size of the data
>>
>> 2). Cross platform issue:
>> How can I insure that that the (binary?) data sent from the Unix
>> server can be correctly interpreted at the client side?
>>
>> 2). Security issue:
>> How can I prevent clients from directly accessing the files (to
>> prevent malicious or accidental corruption of the data files.?
>>
>
> Since this is going to be on a Unix machine, might I suggest one of the
> Unix/Linux groups? Other than the fact this is going to be appended to
> by a PHP script (which isn't part of your question), I don't see
> anything indicating PHP in involved, much less a PHP question.
>
With the benefit of hindsight, I did not make myself clear. A further
clarification is thus in order:
I have implemented the server side of the solution using PHP. I am
communicating with the C++ frontend using SOAP (i.e. communicating
between PHP on the server and C++ at the client).
My first question is asked because I (assume) SOAP is too heavy for file
transfer (ok not directly a PHP question)
My second question was asked because the files will be created (and
appended) using PHP scripts - and I was wondering if binary files
written by PHP on Unix, may be able to be read by a C++ application
running on Windows.
My third question was asked because I'm a realitive WAMP/LAMP & PHP
newbie and I do not fully understand security issues in this framework.
I simply know that I want to prevent clients from directly accesing the
files.
Hope this helps clarify things
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