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  :: Help-файлы :: GetWeb

.:Getweb.

S A T E L L I F E presents

G e t W e b: The E-mail tool for Access to the World Wide Web
---------------------------------------------------------------
---------------------------------------------------------------
INTRODUCTION

Welcome to Using GetWeb! GetWeb provides access to a number of Internet resources through a simple exchange of e-mail messages. GetWeb employs specific and easy to learn commands that give you a powerful but inexpensive tool to access health information from the World Wide Web, even if you do not have full Internet access.
---------------------------------------------------------------------
USING GETWEB
---------------------------------------------------------------------
PART 1 - BASIC FEATURES

A. RETRIEVING A SINGLE PAGE
B. UNDERSTANDING THE RESULTS RETRIEVED
C. RETRIEVING MORE THAN ONE WEB PAGE
D. FOLLOWING HYPERLINKS TO OTHER WEB PAGES
E. USING GETWEB TO SEARCH THE WORLDWIDE WEB
F. HOTLIST OF RECOMMENDED WEB SITES
------------------------------------------------------
PART 2 - ADVANCED FEATURES

A. FOLLOWING CHAINS OF LINKED DOCUMENTS
B. BREAKING COMMANDS BETWEEN MULTIPLE LINES
C. SPLITTING MESSAGES
D. REQUESTING A WEB PAGE AS AN HTML SOURCE DOCUMENT
E. BINARY FILES

---------------------------------------------------------------------
USING GETWEB - PART 1: BASIC FEATURES
---------------------------------------------------------------------

A. RETRIEVING A SINGLE PAGE

SATELLIFE's GetWeb server allows you to request the text content of World Wide Web pages through e-mail. To get information from a particular World Wide Web page such as the World Health Organization (WHO) Home Page, you would:

1. Compose a new e-mail message to the following address:
getweb@usa.healthnet.org

2. Leave the subject line blank. In the body of the message, type the command get followed by the URL of the Web page you want to retrieve.

3. If your mailer software automatically inserts unwanted text (a signature, for example) at the beginning or end of your message, an error will occur. You can prevent this by enclosing your commands in a begin and end block as shown below. The GetWeb server ignores any text that appears
before or after the block.

4. Your message will look like the following:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :

----- Message Text -----

begin

get http://www.who.org

end
------------------------------------------------------------

B. UNDERSTANDING THE RESULTS RETRIEVED

When SATELLIFE receives your message, the GetWeb server retrieves the requested page from the Web, formats it as plain text, and sends it to you as an e-mail message.

There are two main sections in the results message:

1. Text: The top portion of the document contains text from the World Health Organization Home Page. Some of this text contains the titles of other
referenced Web pages of the WHO called hyperlinks. Every hyperlinked reference is numbered in brackets at the end of each line.

2. References: The bottom section contains a list of these same reference numbers and their corresponding URLs (or World Wide Web address).

A truncated portion from the results message is shown below. Please note that Web pages may differ than the sample shown. This is because Web sites are updated frequently and often change.

Sample Result for Retrieving a Single Web Page

Date: Mon, 26 Jul 1999 10:48:17 -0400 (EDT)
From: getweb@usa.healthnet.org
To: <you@yourdomain.com>
Subject: <URL:http://www.who.org/> WHO/OMS: World Health Organization
----- Message Text -----

WHO/OMS World Health Organization

[IMAGE] [IMAGE]

What's New[1]Governance[2]Health Topics[3]Information Sources[4]
Reports[5]Director-General[6]About WHO[7]Search[8]

31 May : World No-Tobacco Day[9]

[IMAGE] [IMAGE]

What's New[10] | Governance[11] | Health Topics[12] | Information
Sources[13] | Reports[14] | Director-General[15] | About WHO[16] |
WHO Regional and Other Offices[17] | Related Links[18] | Other UN Web
Sources[13] | Reports[14] | Director-General[15] | About WHO[16] |
WHO Regional and Other Offices[17] | Related Links[18] | Other UN Web
sites[19]
Site Map[20] | Search[21] | Contact WHO[22]
co World Health Organization / Organisation mondiale de la Sante',1997-1998
Acknowledgements[23] - Copyright notice and disclaimer[24]

*** References from this document ***

[orig] http://www.who.org/
[1] http://www.who.org/home/whatsnew.html
[2] http://www.who.org/home/governance.html
[3] http://www.who.org/home/map_ht.html
[4] http://www.who.org/home/info.html
[5] http://www.who.org/home/reports.html
[6] http://www.who.org/inf-dg/
[7] http://www.who.org/aboutwho/
[8] http://www.who.org/home/search/
[9] http://www.who.org/toh/worldnotobacco99/teaser.htm
[10] http://www.who.org/home/whatsnew.html
[11] http://www.who.org/home/governance.html
[12] http://www.who.org/home/map_ht.html
[13] http://www.who.org/home/info.html
[14] http://www.who.org/home/reports.html
[15] http://www.who.org/inf-dg/
[16] http://www.who.org/aboutwho/
.......
----------------------------------------------------------

C. RETRIEVING MORE THAN ONE WEB PAGE

GetWeb can also be used to retrieve more than one Web page at a time. Simply include several URLs in a single message.

For example, if you want to retrieve the following three URLs representing the Home Pages of these organizations.

1. World Health Organization - http://www.who.org
2. SATELLIFE - http://www.healthnet.org
3. Network Startup Resource Center (NSRC) - http://www.nsrc.org

Your message would look like the sample message below:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :

----- Message Text -----

begin

get http://www.who.org
get http://www.healthnet.org
get http://www.nsrc.org

end
--------------------------------------------------------

D. FOLLOWING HYPERLINKS TO OTHER WEB PAGES

Web pages often reference other Web pages by what is called a hyperlink. Hyperlinks are an electronic link to other pages at the same Web site, or
to pages of related interest at a different site.

As you saw in the previous example, each hyperlink is represented with a reference number in brackets. These numbers correspond to a list at the
bottom of the message, which provides the URL for each of the linked pages. To follow a hyperlink, simply identify the URL and send another e-mail
message requesting that page.

For example, if you wanted to know more about the World Health Organization you would want to follow the hyperlink titled "About WHO." To do this you would:

1. Look in the Top section of the results message and find this title and the reference number in brackets which is [16]. (See example results above.)

2. Locate [16] in the list of reference numbers in the Bottom section of the results message and find the corresponding URL address, in this case:

http://www.who.org/aboutwho/

3. You would then send another message to GetWeb to retrieve the new URL.

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :
----- Message Text -----

begin

get http://www.who.org/aboutwho/

end
-----------------------------------------------------------

E. USING GETWEB TO SEARCH THE WORLDWIDE WEB

GetWeb can be used to access several Internet Search Engines in order to search the World Wide Web for information. The vast repositories of
information on the World Wide Web are of highly variable quality and search engines will retrieve both useful and not so useful results.

*** SEARCH ENGINES GETWEB SUPPORTS

GetWeb is not itself a search engine. But using GetWeb, you can make use of certain search engines on the Web. Currently GetWeb supports the search engines AltaVista, Yahoo!, and Infoseek.

*** SPECIFYING KEYWORDS

In order to conduct a Web search, you will need to select a word or set of words, called "keywords," which describe your chosen subject. When you
submit these keywords to the search engine, it searches through the text posted on a large number of Web sites for those specific words. When it has
completed the search, the search engine gives you a list of all the pages on which those words can be found.

We suggest that you try your search first with AltaVista. Then, if the result is too large, or does not contain useful information, try one of the other search engines.

To access one of these search engines:

1. Compose a message to getweb@usa.healthnet.org and leave the subject line blank.

2. In the body of the message type search followed by the name of the search engine, all in capital letters, and the keywords for your search.

Suppose that a user, joe@anywhere.healthnet.org, needs statistics about  malaria in Africa. Joe hopes this information is located somewhere within
one of the millions of documents making up the World Wide Web, and decides to execute a Web search using the AltaVista search engine.

Joe reasons that the sort of document he is looking for might contain the words "malaria" and "Africa." He therefore sends the following message:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :

----- Message Text -----

begin

Search ALTAVISTA malaria and Africa

end
----------------------------------------

*** SAMPLE WEB SEARCH RESULTS

When GetWeb receives the message, it forwards the message to AltaVista. AltaVista searches the Web and sends a message back to GetWeb. The message is then forwarded to Joe.

*** FOLLOW-UP WEB SEARCH

Joe decides that the document titled Malaria Africa [40] looks promising. He refers to the bottom of the results message and locates the [40] with
the corresponding URL (http://www.medguide.org.zm/whodocs/malaafri.htm) and prepares a new message to getweb@usa.healthnet.org

The following command line is included in the body of the message:

get http://www.medguide.org.zm/whodocs/malaafri.htm

*** RESULTS OF FOLLOW-UP WEB SEARCH

GetWeb then sends back to Joe a message containing the World Health Organization's estimated malaria statistics for Sub-Saharan Africa.
-----------------------------------------------------

F. HOTLIST OF RECOMMENDED WEB SITES

A hotlist of URLs which we consider especially interesting and useful is available to you. Send an e-mail message to getweb@usa.healthnet.org, and
in the text, type:

begin

get file:/help/HOTLIST.html

end

---------------------------------------------------------------------
USING GETWEB: PART 2 - ADVANCED FEATURES
---------------------------------------------------------------------
A. FOLLOWING CHAINS OF LINKED DOCUMENTS
B. BREAKING COMMANDS BETWEEN MULTIPLE LINES
C. SPLITTING MESSAGES
D. REQUESTING A WEB PAGE AS AN HTML SOURCE DOCUMENT
E. BINARY FILES
--------------------------------------------------------------

A. FOLLOWING CHAINS OF LINKED DOCUMENTS

If you know what link you are going to follow from an intermediate document, you do not need to download the whole document. You can instead
use the FOLLOW command.

Suppose you received a document that looked like this:

Some important conferences carried by SATELLIFE include:

* ProMED: Program for Monitoring Emerging Diseases[1]
* ProCAARE: Program for Collaboration Against AIDS[2]
* E-Drug: Essential Drugs[3]

** References from this document **
[1] http://www.healthnet.org/programs/promed.html
[2] http://www.healthnet.org/programs/procaare.html
[3] http://www.healthnet.org/programs/edrug.html

You could then send a message to GetWeb that looked like this:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :
----- Message Text -----

begin

get http://www.healthnet.org/programs/ FOLLOW 2

end
------------------------------------------------
Once the message was received, GetWeb would send you the description of ProCAARE.

You can chain together multiple FOLLOW directives. For example, if you were to receive the document above, and you already knew that you were going to want the fifth document linked to the ProCAARE page, you would send a message that looked like this:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :
----- Message Text -----

begin

get http://www.healthnet.org/programs/ FOLLOW 2 FOLLOW 5

end
------------------------------------------------

B. BREAKING COMMANDS BETWEEN MULTIPLE LINES

If the URL is too long to fit into a single line, you can break it up by surrounding it with angle brackets < > or by ending the line with a backslash \.

For example:

GET http://www.yahoo.com/text/Regional/Countries/Czech_Republic/

is the same as

GET <http://www.yahoo.com/text/Regional/Countries/Czech_Republic/>

which is also the same as

GET http://www.yahoo.com/text/Regional/Countries/Czech_Republic/
-------------------------------------------------------------

C. SPLITTING MESSAGES

If a message is larger than 20 kilobytes (20kb), GetWeb will automatically split it into two or more 20kb files, and send each file as a separate
message. If you would prefer that the messages be split into files of a different size, you can add a SPLIT command to your request. You would type
SPLIT and then the size, in bytes, of the messages as you would like them to be sent, at the beginning of each line in which you make a request.

If you make more than one request, place the SPLIT command at the beginning of each request. For example, if you wanted to request two pages from HealthNet Web site, and you wanted the information to be sent to you in files of 10kb or less, your message would look like this:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :
----- Message Text -----

begin

SPLIT 10000 get http://www.healthnet.org

SPLIT 10000 get http://www.healthnet.org/programs/promed.html

end
------------------------------------------------

If you wanted to do a Web search using Alta Vista on tobacco and lung cancer, and you wanted the results of your search to be sent to you in
files of 40kb or less, your message would look like this:

SPLIT 40000 search ALTAVISTA tobacco "lung cancer"
-----------------------------------------------------

D. REQUESTING A WEB PAGE AS AN HTML SOURCE DOCUMENT

If you have a browser which can interpret HTML documents, you might wish to download a Web page as an HTML source document. Then, you could use your browser to view the page locally, or make it available for others to do so.

In order to retrieve a Web page as an HTML source document rather than as plain text, insert the word SOURCE after the command GET and before the URL of the document. For example, if you wanted to receive the HealthNet home page as an HTML source document, you would send a message that looked like this:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :
----- Message Text -----

begin

get source http://www.healthnet.org

end
------------------------------------------------

E. BINARY FILES

If you are using GetWeb to retrieve certain types of electronic documents, such as image files, software, files in Word or WordPerfect, or files which
have been compressed, GetWeb will send these files to you in binary form. Unless you specify otherwise, GetWeb will send any binary message as Base64 MIME file-attach. Like UUEncode, MIME (Multipurpose Internet Mail Extension) is a method of encoding binary files into a mailable text format.

If you would like your binary message to be formatted in UUEncode, rather than in MIME, you can use the NOMIME modifier. In order to retrieve a
binary message formatted in UUEncode, insert the word NOMIME after the command GET and before the URL of the document. For example, if you wanted to get the zipped copy of the mpack utility in UUEncode format, you would
send a message that looked like this:

To :getweb@usa.healthnet.org
Cc :
Attchmnt:
Subject :
----- Message Text -----

begin

get NOMIME ftp://ftp.andrew.cmu.edu/pub/mpack/mpack15d.zip

end
------------------------------------------------
Please note that there are limits on the number of bytes that GetWeb will
send.

THE END

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