scholarly journals REMOTE SENSING ANALYTICAL GEOSPATIAL OPERATIONS DIRECTLY IN THE WEB BROWSER

2018 ◽  
Vol XLII-4 ◽  
pp. 403-410 ◽  
Author(s):  
J. Masó ◽  
A. Zabala ◽  
I. Serral ◽  
X. Pons
Keyword(s):  
Remote Sensing ◽  
Web Service ◽  
Remote Sensing Data ◽  
Web Browsers ◽  
Spectral Indices ◽  
Spatial Filters ◽  
Web Browser ◽  
Server Side ◽  
Client Side ◽  
Fine Tune

<p><strong>Abstract.</strong> Current map viewers that run on modern web browsers are mainly requesting images generated on the fly in the server side and transferred in pictorial format that they can display (PNG or JPEG). In OGC WMS standard this is done for the whole map view while in WMTS is done per tiles. The user cannot fine tune personalized visualization or data analysis in the client side. Remote sensing data is structured in bands that are visualize individually (manually adjusting contrast), create RGB combinations or present spectral indices. When these operations are not available in map browsers professional are forced to download hundreds of gigabytes of remote sensing imagery to take a good look at the data before deciding if it fits for a purpose. A possible solution is to create a web service that is able to perform these operations on the server side (https://www.sentinel-hub.com). This paper proposes that the server should communicate the data values to the client in a format that the client can directly process using two new additions in HTML5: canvas edition and array buffers. In the client side, the user can interact with a JavaScript interface changing symbolizations and doing some analytical operations without having to request any data again to the server. As a bonus, the user is able to perform queries to the data in a more dynamic way, applying spatial filters, creating histograms, generating animations of a time series or performing complex calculations among bands of the different loaded datasets.</p>

scholarly journals WPS-based technology for client-side remote sensing data processing

2015 ◽  
Vol XL-7/W3 ◽  
pp. 643-649 ◽  
Author(s):  
E. Kazakov ◽  
A. Terekhov ◽  
E. Kapralov ◽  
E. Panidi
Keyword(s):  
Remote Sensing ◽  
Web Services ◽  
Data Processing ◽  
Remote Sensing Data ◽  
Basic Research ◽  
Data Types ◽  
Sensing Data ◽  
Server Side ◽  
Executable Code ◽  
Client Side

Server-side processing is principal for most of the current Web-based geospatial data processing tools. However, in some cases the client-side geoprocessing may be more convenient and acceptable. This study is dedicated to the development of methodology and techniques of Web services elaboration, which allow the client-side geoprocessing also. The practical objectives of the research are focused on the remote sensing data processing, which are one of the most resource-intensive data types. <br><br> The idea underlying the study is to propose such geoprocessing Web service schema that will be compatible with the current serveroriented Open Geospatial Consortium standard (OGC WPS standard), and additionally will allow to run the processing on the client, transmitting processing tool (executable code) over the network instead of the data. At the same time, the unity of executable code must be preserved, and the transmitted code should be the same to that is used for server-side processing. This unity should provide unconditional identity of the processing results that performed using of any schema. The appropriate services are pointed by the authors as a Hybrid Geoprocessing Web Services (HGWSs). <br><br> The common approaches to architecture and structure of the HGWSs are proposed at the current stage as like as a number of service prototypes. For the testing of selected approaches, the geoportal prototype was implemented, which provides access to created HGWS. Further works are conducted on the formalization of platform independent HGWSs implementation techniques, and on the approaches to conceptualization of theirs safe use and chaining possibilities. <br><br> The proposed schema of HGWSs implementation could become one of the possible solutions for the distributed systems, assuming that the processing servers could play the role of the clients connecting to the service supply server. <br><br> The study was partially supported by Russian Foundation for Basic Research (RFBR), research project No. 13-05-12079 ofi_m.

HTTPV

2014 ◽  
pp. 84-95
Author(s):  
Subrata Acharya
Keyword(s):  
Common Sense ◽  
Content Distribution ◽  
High Volume ◽  
Distribution Networks ◽  
Content Distribution Networks ◽  
Web Browser ◽  
Server Side ◽  
Integrity Protection ◽  
In Transit ◽  
Client Side

There is a need to be able to verify plaintext HTTP content transfers. Common sense dictates authentication and sensitive content should always be protected by SSL/HTTPS, but there is still great exploitation potential in the modification of static content in transit. Pre-computed signatures and client-side verification offers integrity protection of HTTP content in applications where SSL is not feasible. In this chapter, the authors demonstrate a mechanism by which a Web browser or other HTTP client can verify that content transmitted over an untrusted channel has not been modified. Verifiable HTTP is not intended to replace SSL. Rather, it is intended to be used in applications where SSL is not feasible, specifically, when serving high-volume static content and/or content from non-secure sources such as Content Distribution Networks. Finally, the authors find content verification is effective with server-side overhead similar to SSL. With future optimization such as native browser support, content verification could achieve comparable client-side efficiency.

scholarly journals Development Authentication and Authorization Systems of Multi Information Systems Based REst API and Auth Token

2020 ◽  
Vol 1 (2) ◽  
pp. 127
Author(s):  
Indra Gita Anugrah ◽  
Muhamad Aldi Rifai Imam Fakhruddin
Keyword(s):  
System Integration ◽  
Web Browser ◽  
Single Sign On ◽  
Server Side ◽  
Secure Data ◽  
Authentication And Authorization ◽  
Information System Integration ◽  
Rest Api ◽  
Client Side

The security of an application is the most important problem in an information system integration process. The authentication and authorization process is usually carried out using Single Sign On (SSO). Authentication and authorization methods are used to secure data in a system. The authentication and authorization processes are carried out on the client side (web browser) in the form of a session and on the server side (web server) in the form of cookies. Sessions and cookies are valuable assets in the authentication and authorization process because they contain the data required for the login process so that the session and cookies need to be secured. Session is a combination of username and password data that has been encrypted while cookies store login information data so that they are still in a state of gaining access according to the privileges given to the user. So important is the role of sessions and cookies in the authentication and authorization process, so we need a way to secure data on sessions and cookies. One way to secure data is to use the REst API and Auth Token.

scholarly journals Interoperabilitas perangkat lunak menggunakan RESTful web service

2018 ◽  
Vol 4 (1) ◽  
pp. 14
Author(s):  
M. Miftakul Amin
Keyword(s):  
Web Services ◽  
Web Service ◽  
Programming Languages ◽  
Visual Basic ◽  
Heterogeneous Environments ◽  
Server Side ◽  
Systems Software ◽  
Restful Web Service ◽  
Restful Web Services ◽  
Client Side

Pengembangan sistem informasi membutuhkan interoperabilitas dalam lingkungan yang heterogen, dilihat dari sistem operasi, perangkat lunak, bahasa pemrograman, dan basis data, sehingga dapat saling berkomunikasi dan bertukar data atau informasi. RESTful web service dapat digunakan sebagai salah satu teknologi untuk mewujudkan interoperabilitas. Sebuah studi kasus tentang aplikasi perpustakaan telah digunakan dalam penelitian ini. Aplikasi tersebut dibangun dengan Slim Framework PHP untuk sisi server dan Visual Basic pada sisi client. Komunikasi antara client dan server menggunakan HTTP method yaitu GET, POST, PUT, dan DELETE. Pengujian telah dilakukan untuk melihat performa dari web service yang telah dikembangkan menggunakan perangkat lunak Postman. Hasil dari penelitian ini menunjukkan bahwa, aplikasi client dapat mengakses web service yang disediakan di sisi server sebagai wujud interoperabilitas.   Information development systems need interoperability in heterogeneous environments, seen from operating systems, software, programming languages, and databases, so that they can communicate and exchange data or information. RESTful web services can be used as one of the technologies to realize interoperability. As case studies build library applications using PHP Slim Framework on the server side, while Visual Basic programming language is used on the client side. Communication Between client and server using HTTP Method that is GET, POST, PUT, and DELETE. Testing has been done to see the performance of web service functionality that has been developed using Postman software. The result shows that client applications can access the web services provided on the server side as a form of interoperability.

PAKE on the Web

2011 ◽  
pp. 337-350
Author(s):  
Xunhua Wang ◽  
Hua Lin
Keyword(s):  
Web Sites ◽  
Web Applications ◽  
Identity Management ◽  
Mutual Authentication ◽  
Specific Information ◽  
Mobile Code ◽  
Web Browser ◽  
Server Side ◽  
Client Side ◽  
The Web

Unlike existing password authentication mechanisms on the web that use passwords for client-side authentication only, password-authenticated key exchange (PAKE) protocols provide mutual authentication. In this article, we present an architecture to integrate existing PAKE protocols to the web. Our integration design consists of the client-side part and the server-side part. First, we implement the PAKE client-side functionality with a web browser plug-in, which provides a secure implementation base. The plug-in has a log-in window that can be customized by a user when the plug-in is installed. By checking the user-specific information in a log-in window, an ordinary user can easily detect a fake log-in window created by mobile code. The server-side integration comprises a web interface and a PAKE server. After a successful PAKE mutual authentication, the PAKE plug-in receives a one-time ticket and passes it to the web browser. The web browser authenticates itself by presenting this ticket over HTTPS to the web server. The plug-in then fades away and subsequent web browsing remains the same as usual, requiring no extra user education. Our integration design supports centralized log-ins for web applications from different web sites, making it appropriate for digital identity management. A prototype is developed to validate our design. Since PAKE protocols use passwords for mutual authentication, we believe that the deployment of this design will significantly mitigate the risk of phishing attacks.

XML Pipeline Processing in the Browser

2010 ◽  
Author(s):  
Vojtěch Toman
Keyword(s):  
Web Application ◽  
Web Applications ◽  
Application Development ◽  
Web Browser ◽  
Development Models ◽  
Server Side ◽  
Potential Benefits ◽  
Pipeline Processing ◽  
Xml Web ◽  
Client Side

With the growing interest in end-to-end XML web application development models, many web applications are becoming predominantly XML-based, requiring XML processing capabilities not only on the-server-side, but often also on the client-side. This paper discusses the potential benefits of using XProc for XML pipeline processing in the web browser and describes the developments of a JavaScript-based XProc implementation.

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