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研究生:古永忠
研究生(外文):Yung-Chung Ku
論文名稱:IPP系統上網路物件轉送模組化強化
論文名稱(外文):Modularity Enhancement for Web Object Delivery in IPP System
指導教授:李肇林李肇林引用關係
指導教授(外文):Tzao-lin Lee
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:資訊工程學研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:32
中文關鍵詞:網路物件代理伺服器轉送網路服務模組化
外文關鍵詞:Web ServiceWeb ObjectProxyDeliveryModularity
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隨著網際網路的蓬勃發展,越來越多的資訊與服務架構在網際網路之上。然而,使用網路的環境與設備也越來越多變化及差異性。種種的限制,在某些情況可能造成瀏覽或下載的不便,可能是使用者失去耐性,或者伺服器逾時中斷,而使得原本的期待民咫@簣。
這些問題的解決方案,在IPP這個經過修改過的代理伺服器中已被開發出來,稱為網路物件轉送系統,幫助使用者在使用不同的網路環境或設備時,仍可獲得或提昇其所希望的品質。只要使用者事先依據本身需求,訂定相關的規則,代理伺服器將自動化地根據規則決定各種網路物件的相關動作。
但其仍然存在一些系統上的問題,我特別針對任務排程以及轉送模組做了深入的研究,並予以改良。有良好的任務排程,可增加系統的效率,亦可幫助使用者更確實掌握轉送流程。而透過模組化的設計,可直接將已有的程式,包入轉送的流程中,增加後續處理的彈性。
我在Microsoft Windows的平台上實作這個系統,並撰寫一些簡單的網路應用程式測試,確實可輕易外掛模組。
With the tremendous growth of World Wide Web, more and more information and services are provided on the Web. However the client space and speed has become heterogeneous in terms of device capabilities. Various restrictions may cause inconvenient for browsing or downloading. It may be caused by the user losing tolerance or timeout of the service, so the hope was gone.
These problems were solved by IPP, a modified proxy system. It is called Web Object Deliver System. It helps to improve the quality of service when the user switches various network environment and device. If only the user sets the rules in advance, the proxy server will execute the correlative actions automatically.
There are still some problems in the system. I specially do some researches deeply and aim at task scheduling and delivery modularity. I improve them in this paper. Good scheduling makes the service more efficient and helps the user know each step when delivering. The designs of modularity are able to include any program into the delivery method.
I implemented the program in the Microsoft Windows and write some web programs to prove it.
1. Introduction 1
2. Overview of Web Object Delivery System 4
2.1 Introduction to IPP 4
2.2 The Rule Model 6
2.3 Architecture Enhancement 8
3. Modularity Class 11
4. Scheduling 14
4.1 Requirements 14
4.2 Scheduling Mechanism 15
4.2.1 Batch Processing 16
4.2.2 FIFO with Priority 16
4.2.3 Aging Mechanism 16
4.3 Performance Improvement 17
5. Modularity 20
5.1 Module Requirements 20
5.2 Flow Diagram 21
5.3 Security and Performance 24
5.4 Advantages 24
6. Implementation and Experimental Results 26
7. Conclusion 29
8. Future Work 31
Reference 32
[1]楊凱翔, “An Integrated Personal Proxy for Heterogeneous Devices”, 台大資訊工程研究所博士論文, 2004年6月
[2]Apache module mod_proxy. http://httpd.apache.org/docs/mod/mod_proxy.html.
[3]Simple Mail Transfer Protocol. RFC 2821. http://www.ietf.org/rfc/rfc2821.txt.
[4]File Transfer Protocol. RFC 959. http://www.ietf.org/rfc/rfc959.txt
[5]MySQL database. http://www.mysql.org.
[6]PHP scripting language. http://www.php.net.
[7]Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies. RFC 2045.
http://www.ietf.org/rfc/rfc2045.txt.
[8]Apache 1.3 Dynamic Shared Object (DSO) Support.
http://httpd.apache.org/docs/dso.html
[9]Santosh K. Shrivastava and Daniel L. McCue, “Structuring Fault-Tolerant Object System for Modularity in a Distributed Environment”, IEEE Transactions on Parallel and Distributed Systems, Vol. 5, No. 4, April 1994
[10]Richard N. Langlois, “Modularity in Technology and Organizations”, Network Institutional Theory, February 2000
[11]Apache HTTP Project, http://httpd.apache.org/
[12]Hyper Text Transfer Protocol(HTTP),
http://www.w3.org/Protocols/rfc2616/rfc2616.html
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