Yes, you only need the server to run http 1.1 which most do. Also
the browser should be able to accept that (which most do) and the
browser has to not send a close command which at times they do.
A lot of things are controlled by the user in this situation.
Whether accepting a open keep-alive http connection or http
compression. Lucky a lot of this is already taken care of from the
server end. Storing the images in the db or on the file system
isn't going to change anything there and the end client browser
really for the most part doesn't care.
John
From: [EMAIL PROTECTED] [ mailto:[EMAIL PROTECTED] On Behalf Of
Fennell, Mark P.
Sent: Thursday, January 18, 2007 12:07 PM
To: discussion@acfug.org
Subject: RE: [ACFUG Discuss] Image from DB
Additionally, I think HTTP 1.1 allows connection keep-alives so
that you only make one http call for the entire page. Right?
mf
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of John Mason
Sent: Thursday, January 18, 2007 12:03 PM
To: discussion@acfug.org
Subject: RE: [ACFUG Discuss] Image from DB
Don't get me wrong, I understand it's an experiement and it's fun
to try.
1. You're not actually reducing your http requests. <-- My main
point with this.
3. You can save the image data in the database as a BLOB and
output it onto a page. You'll need to use cfcontent to set the
precise MIME type. If you're using IIS 6, the MIME types are much
more strict than they use to be.
John
[EMAIL PROTECTED]
From: [EMAIL PROTECTED] [ mailto:[EMAIL PROTECTED] On Behalf Of
Derrick Peavy
Sent: Thursday, January 18, 2007 11:56 AM
To: discussion@acfug.org
Subject: Re: [ACFUG Discuss] Image from DB
Kindly, and with respect to everyone that replied:
1. As I stated, the goal is to reduce http requests, not file
sizes. And "this is an experiment," please forgive, but the "Why"
of why I want to do this is not part of the answer.
2. Don't really need a discussion about the database design or
benefits of A or B
3. Looking for an answer to the question - How to get image in DB,
image out of DB, using CF and MySQL?
Any takers for that?
_____________
Derrick Peavy
Sales and Web Services
Universal Advertising
Phone: 404-786-5036
Fax: 404-370-0470
http://www.universaladvertising.com
http://www.collegeadvertising.com
http://www.collegeclassifieds.com
___________________________________
On Jan 18, 2007, at 10:32 AM, Teddy Payne wrote:
This seems to be asked often about images and BLOBs. I know you
are testing an idea out and maybe you can get it to work somehow,
but from a data perspective you just don't want to use a BLOB.
There is only one technique to reduce up front cost of a BLOB and
that is to have a BLOB table. The table would not be a part of
the primary table, so you would not intefere with indexing and
collation. You would have a normalized table with a foreign key
that you would only use for that web service.
Now for the webservice, wouldn't you want to return the lowest
common denomenator of data? If you are returning HTML or
something that needs to reference the image, it is acceptable to
have a reference with an absolute URL back to your server. The
benefit here is that the web service is consumed quicker, but the
page load would be based on the network retrieving the data.
In addition, you would want inside of your web service a way not
to return the image that would even speed up the browsing unless
the user really wants the image.
Teddy
On 1/18/07, Fennell, Mark P. < [EMAIL PROTECTED]> wrote:
I'm just curious. What are the benefits of storing the image in
the db rather than storing the file on the filesystem and the
path in the db? I mean, for a web page, all you need is the <img>
and the path. I can understand how it might be useful in some VB
or C or Java app where the client doesn't display images with
such ease, but for a web app...? Thanks.
mf
-----Original Message-----
From: [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED] Behalf Of John
Mason
Sent: Thursday, January 18, 2007 10:16 AM
To: discussion@acfug.org
Subject: RE: [ACFUG Discuss] Image from DB
I believe there would still be three http requests here. The
images would still be called up in the html like <img src="">
right? Sorry but in http that would still create seperate http
requests.
John
[EMAIL PROTECTED]
From: [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED] On Behalf Of
Derrick Peavy
Sent: Thursday, January 18, 2007 9:35 AM
To: discussion@acfug.org
Subject: [ACFUG Discuss] Image from DB
Probably an easy problem for someone...
I want to put two small images in my database and then output
them in my app, so that they do not constitute additional http
requests. Consider it an experiment - I know that it may seem a
bit silly. The goal is for the entire page to be delivered to the
browser in one http request, instead of 3 (two images and one cf
page) without doing any Apache tinkering. I have looked around
the net for answers and cannot seem to make this work.
Database field is "imageFile" of type BLOB in MySQL 4.1.13. What
is the proper way to insert the image?
Example: INSERT into Images (imageFile) values ('#base64(image)#')
-Or-
Example: INSERT into Images (imageFile) values ('#image#')
And then of course, how do you retrieve it? Example: SELECT
imageFile FROM Images WHERE imageID=1
<cfoutput>
#toString(imageFile)#
</cfoutput>
-OR-
<cfoutput>
#toBinary(imageFile)#
</cfoutput>
As I say, I've not been able to make this work. If I use toString
(), I simply get the raw data. If I use toBinary(), I get an
error that the data cannot be converted to a string. Also, using
CFCONTENT is fine to output the image, but then any code after
that is ignored. So, short of saving the entire page and then
outputting, it, I don't see a way to use CFCONTENT.
_____________
Derrick Peavy
Sales and Web Services
Universal Advertising
Phone: 404-786-5036
Fax: 404-370-0470
http://www.universaladvertising.com
http://www.collegeadvertising.com
http://www.collegeclassifieds.com
___________________________________
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<cf_payne />
Adobe Certified ColdFusion MX 7 Developer
Atlanta CFUG (ACFUG): http://www.acfug.org
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