Axis 700 Guía de configuración rápida

AXIS 700 Application Integration

Introduction

Scanning using your AXIS 700 can be divided into two types:

•Pull Type Scanning, which is initiated from an application and performed by using the

HTTP protocol

•Push Type Scanning, which is initiated from the control panel of your AXIS 700 and

performed by using the FTP protocol.

This document describes how to integrate your AXIS 700 using both of these methods. It

also describes how you can use FTP to obtain, and possibly modify, a list of available

profiles. It contains the following information:

•Scanning

−HTTP Commands and Headers Required

−Pull Type Scanning

−Push Type Scanning

−Using Microsoft’s Foundation Classes.

−Using Microsoft’s Internet API

•Using the config.ini file to add, modify and remove profiles.

Axis Communications AB

September 1st, 1998

Table of Contents

-RXVSHYGXMSR

7GERRMRK

4YPP8]TI7GERRMRK

HTTP Command Sequence...........................................................................................3

Scanning Using MFC.....................................................................................................5

Scanning Using the WinInet API...................................................................................6

4YWL8]TI7GERRMRK 

%GGIWWMRKXLI0MWXSJ7GERRMRK4VSJMPIW  

Scanning

Once you have decided which one of the available profiles you want to use, you can proceed

with the scanning.

Pull Type Scanning

Pull type scanning uses the HTTP protocol. To do this, you need to emulate Scan-to-Web

from your application.

HTTP Command Sequence

When scanning from the 7GER(SGYQIRXpage in your Web browser:

1. Select a profile from the profile list.

2. Click either the 7GER button or the 6IWIVZI button.

A 4378 request is sent to your AXIS 700. It contains the name of the page, the name of the

selected profile, and the name of the button you selected.

Your AXIS 700 makes sure that:

•A scanner is connected and supported.

•The scanner is not busy.

•The selected profile exists.

•Users are allowed to do Scan-to-Web.

When all of these conditions are met you will receive an HTTP response stating that the

document has moved temporarily, along with the URL to the image itself.

However, if some of the conditions are not met, e.g. the scanner is busy, the response will

contain the complete 7GER(SGYQIRXpage, including an error message at the top.

If you received the 1SZIH8IQTSVEVMP] response, you should send a +)8request to get the

URL you received in the response.

Follow the steps below to scan an image to your application using your AXIS 700.

1. Send a HTTP request with, at least, the following headers:

POST /user/scan/scan.shtml HTTP/1.0

Content-type: application/x-www-form-urlencoded

Content-length: 40

page=scan&profileName=Color+low&scanNow=

The last row contains the parameters to your AXIS 700.

page=scan - necessary for your AXIS 700 to process your request.

profileName=Color+low - tells your AXIS 700 which profile to use.

scanNow - immediate scan. No value is needed.

If you replace scanNow with reserve then the scanner is reserved, but the user is

required to push the 7IRH button on the front panel of your AXIS 700. This is the

same as clicking the 6IWIVZI button on the 7GER(SGYQIRX page.

Your AXIS 700 will respond with either status 1SZIHXIQTSVEVMP] or 

3/.

If you receive the 3/ response then something has gone wrong, e.g. the

scanner could be busy. The content of the response is a complete 7GER(SGYQIRX

page, including an error message.

The 1SZIH8IQTSVEVMP]response means that the scanning is initiated.

2. The 1SZIH8IQTSVEVMP]response includes the URL to the scanned image. It

is on the form /image.xxx where xxx is one of pdf, jpg, or tif. The table below lists

the image name and MIME type for the different image types.

Image Type Image Name MIME Type

PDF image.pdf application/pdf

TIFF image.tif image/tiff

JPEG image.jpg image/jpeg

Http/1.0 302 Moved Temporarily

Content-Length: 169

Content-Type: text/html

Location: /image.jpg

<head><title>Moved Temporarily</title></head>

<body><h2>Moved Temporarily!</h2>

<p>The requested resource has been temporarily moved

to a new location.

</p>

</body>

The image data can now be retrieved by sending a +)8 request to your AXIS 700

for the URL. The request would look something like this:

GET /image.jpg HTTP/1.0

Accept: image/jpeg, */*

Your AXIS 700 will now respond by sending you a 3/ response and image

data.

ScanningUsing MFC

Microsoft Foundation Classes (MFC) offers good support for Internet connections,

especially when it comes to HTTP and FTP. As described above, scanning is performed by

requesting a 4378using HTTP. If the operation is successful, the image is returned via a

redirect response. The steps below describe how a scanning is performed using MFC. If you

need more information about the classes described, see the MFC documentation. The

following code is not checked for errors.

1. Create a CInternetSession object:

CInternetSession aSession("ScanSDK");

The parameter is a string identifying the application. An application needs only

one instance of this class.

2. Using this object you can now retrieve an HTTP connection:

CHttpConnection* anHttpConnection =

aSession.GetHttpConnection("somescanserver",

(INTERNET_PORT) 80,

NULL,

NULL);

3. Using this connection, you can now open a request. By default, redirect responses

are handled automatically:

CHttpFile* anHttpFile =

anHttpConnection->OpenRequest(0,

"/user/scan/scan.shtml");

The first parameter defines that a POST request shall be opened, the second is the

request target.

4. Create a query string containing the parameters you want to send:

CString aQueryString =

"\n\npage=scan&profileName=Color+low&scanNow=";

5. Add an HTTP header which informs the HTTP server that the request contains

encoded data:

anHttpFile->AddRequestHeaders(

"Content-type: application/x-www-form-urlencoded");

6. Send the request:

anHttpFile->SendRequest(NULL,

(void*)(const char*)aQueryString,

aQueryString.GetLength());

The method will not return ????? until a response is received from the server or

after a time out.

7. If the request is successful, image data will be sent back. Otherwise an HTML

page containing error information will be sent. One way of testing what was sent

back is to look at the Content-type. Its value can be retrieved by the following call:

anHttpFile->QueryInfo(HTTP_QUERY_CONTENT_TYPE,aContType);

If all went well, aContType will have the value “image/jpeg” (if JPEG is the

chosen format. See table above.), otherwise “text/html”.

8. Finally we are ready to receive the data:

UINT bytesRead = anHttpFile->Read(buffer, MAXBUF - 1);

while( nBytesRead > 0)

{//Save data somewhere

//Read next chunk

nBytesRead = anHttpFile->Read(buffer,MAXBUF -1);

}

ScanningUsing theWinInet API

If you do not want to use MFC to create an Internet application you can use the WinInet

API instead. It provides basically the same functionality as MFC does and the functions in

the WinInet API are very similar to those in MFC. In the steps below we describe how the

API is used. For more information, see the WinInet documentation. The following code is

not checked for errors.

1. Call InternetOpen to enable an Internet connection:

HINTERNET anInetHandle =

InternetOpen("ScanSDK",

INTERNET_OPEN_TYPE_DIRECT,

NULL,

0);

2. Create an HTTP handle by calling the InternetConnect function with the

necessary parameters:

HINTERNET anHTTPHandle =

InternetConnect(anInetHandle,

"171.16.1.185",

INTERNET_DEFAULT_HTTP_PORT,

"root",

"pass",

INTERNET_SERVICE_HTTP,

0);

3. Use the HTTP handle to open a request. The second parameter indicates that it is

a 4378 request and the third indicates that the target is the ’/user/scan/scan.shtml’

page. By default, redirect responses are handled automatically:

HINTERNET anHttpRequest =

HttpOpenRequest(anHTTPHandle,

"POST",

"/user/scan/scan.shtml",

NULL,

0);

4. Add an HTTP header which informs the HTTP server that the request contains

encoded data:

char aReqStr[] =

"Content-type: application/x-www-form-urlencoded";

HttpAddRequestHeaders(anHttpRequest,

aReqStr,

strlen(aReqStr),

5. Create a query string containing the parameters you want to send and send the

request:

char aQeryStr[] =

"\n\npage=scan&profileName=Color+low&scanNow=";

HttpSendRequest(anHttpRequest,

aQeryStr,

strlen(aQeryStr))

6. If the request is successful, image data will be sent back. Otherwise an HTML

page containing error information will be sent. One way of testing what was sent

back is to look at the Content-type. Its value can be retrieved by the following call:

HttpQueryInfo(anHttpRequest,

&aBuffer,

&aBufferSize,

HTTP_QUERY_CONTENT_TYPE);

The third parameter is the address to a buffer that receives the information, and

the fourth is the address to a variable containing the buffer’s length. After the call

it will contain the size of the information written to the buffer.

If all went well, aContType will have the value "image/jpeg" (if JPEG was the

chosen format (see table above). Otherwise the value will be "text/html".

7. The data can now be received:

// All data has been read when (nrBytesRead == 0)

while(InternetReadFile(anHttpRequest,

aBuffer,

aBufferSize,

&nrBytesRead) &&

nrBytesRead > 0)

{// Save data somewhere

}

8. Finally, it is important to close all opened handles:

InternetCloseHandle(anHttpRequest);

InternetCloseHandle(anHTTPHandle);

InternetCloseHandle(anInetHandle);

Push Type Scanning

We refer to push type scanning as scanning initiated from the control panel of your AXIS

700. The images are pushed out to a directory on an FTP server.

Your application can scan the directory on the FTP server. When new images arrive, the

application can, depending on information sent with the image, take the appropriate actions.

For each image file written to the directory, an information file will also be written, unless

you choose Include Image Information: None when defining the destination. The information

file is in raw text format and it contains data about the image.

Information included in the information file is

•Name and size of the image file.

•Internet address of your AXIS 700.

•Currently connected scanner.

•The name of the destination (the name appearing in the destination list).

•Scanning profile used.

•Paper size.

•Number of pages.

If you selected Include Image Information: Complete, then additional information, such as

resolutions and file format, is also included.

Your application can use values in the information file to trigger actions.

)\EQTPISJMRJSVQEXMSRJMPI The following example is taken from a real scanning, with the

pre-defined scanning profile Text. Here, Image Information Included is set to Complete. If it

was set to Basic, the Image Information part would not be present.

; AXIS 700 Parameter List, V1.10 Jul 29 1998

[General]

File name = branko_subasic001.tif

File size = 71413

Host address = 172.19.4.22

Scanner = FCPA ScanPartner 600C

Destination = Branko FTP

Profile = Text low

Paper size = Letter

Number of pages = 2

[Image Information]

Width = 1696

Height = 2200

Resolution (DPI) = 200

Bits per pixel = 1

Data type = Black & white

Paper orientation = Portrait

Format = CCITT G.4

Double-sided = Off

Intensity = 50

Contrast = 50

; End of Parameter List

It is important to notice that the information file is always written after the image file. Thus

when your application processes the information file the image file itself is guaranteed to be

there already.

)\EQTPI A document distributing system may check the file name to see whom the image is

targeted for. The file name may then be on the form name_lastNameXXX.tif, where XXX is

the sequence number optionally appended by your AXIS 700. Your application can now

decide whom to send the image to.

)\EQTPI A fax server application can use the image name to obtain the fax number, and the

file format to decide how to convert the document to fax data.

See the AXIS 700 Additional Installation Note, Setting Up Your AXIS 700 for Scan-to-File for

information on how to define Scan-to-File destinations.

Accessing the List of Scanning Profiles

The profiles list is stored in the config.ini file, along with all other parameters. It can be

obtained using FTP (see AXIS 700 Additional Installation Note, Reading and Writing the

config.ini file). There is one group stating the number of available profiles, along with their

names. In addition, there is one parameter group for each profile.

To obtain all available profiles it is enough to read the file from your AXIS 700 and find the

group ?4VSJMPIWA. It looks like this:

[Profiles]

Clear List First = no ; yes/no

Profiles = 2

Profile0 = Profile-Text

Profile1 = Profile-Color low

The first parameter defines whether to remove all existing profiles before storing the new

ones or not. The second parameter defines the number of available profiles, which are two in

this case. The following two lines contain the names of the parameter groups defining the

two profiles.

This is a parameter group for a profile:

[Profile-Text]

Description = Text

X-Resolution = 300

Y-Resolution = 300

Data type = Black & white

Paper orientation = Portrait

Image compression = CCITT G.4

File format = TIFF

Double-sided = Off

Document mode = Multi page

Intensity = 50

Contrast = 50

The first parameter is the name of the profile. Then follows the resolutions, the data type etc.

To add a profile you have to create a parameter group for the profile. You also have to

increase the Profiles parameter in the [Profiles] parameter group and add a parameter in that

group defining the name of the new profile.

To remove a profile you have to remove the parameter group. Then you have to modify the

[Profiles] group. Decrease the Profiles parameter and remove the line defining the profile’s

name.

Finally you must write the modified config.ini file to your AXIS 700.

2SXI No validation of the correctness of the defined profiles will occur when writing the

modified config.ini file to your AXIS 700. Scanning using profiles with incorrect values may

result in corrupt images.

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