print barcode in asp.net c# Communicating with remote services in Java

Printer Quick Response Code in Java Communicating with remote services

Communicating with remote services
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<hostname xsi:type="xsd:string"></hostname> <relatedinformationpresent xsi:type="xsd:boolean">true</ relatedinformationpresent> <snippet xsi:type="xsd:string">de offici le site van afc <b>ajax</ b>.</snippet> <summary xsi:type="xsd:string">official club site, including roster, history, wallpapers, and video clips.<br> [english/dutch]</summary> <title xsi:type="xsd:string"> <b>ajax</b>.nl splashpagina </title> ...
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The full SOAP response is too lengthy to include here, we ve presented three snippets. The first part defines some of the transport headers, saying where the response comes from, and so on. Within the body, we find a couple of elements describing the estimated results count the phrase returned 741,000 results, which is not considered to be an exact figure. Finally, we can see part of the first result returned, describing the link to the Dutch football team Ajax s home page. Listing 7.4 shows our callback handler, in which we parse the response.
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Listing 7.4 parseGoogleResponse() function
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function parseGoogleResponse(){ var doc=this.req.responseText.toLowerCase(); document.getElementById('details').value=doc; var startTag='<estimatedtotalresultscount xsi:type="xsd:int">'; var endTag='</estimatedtotalresultscount>'; var spot1=doc.indexOf(startTag); var spot2=doc.indexOf(endTag); var strTotal1=doc.substring(spot1+startTag.length,spot2); var total1=parseInt(strTotal1); var strOut=""; if(total1>=intNum && total1<=intNum+guessRange){ strOut+="You guessed right!"; }else{ strOut+="WRONG! Try again!"; } strOut+="<br/>Your search for <strong>" +document.Form1.yourGuess.value +"</strong> returned " + strTotal1 + " results!"; document.getElementById("spanResults").innerHTML = strOut; }
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For the moment, we aren t concerned with the structure of the SOAP message but only with the estimated number of results returned. The response is valid XML,
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and we could parse it using the XMLHttpRequest object s responseXML property. However, we take the path of least resistance here, and simply extract the estimated result count using string manipulation. We then use a few of our DOM manipulation techniques to present the verdict to the user (how good their guess was). For educational purposes, we also dump the entire XML response into a textarea element, for those who want to look at SOAP data in more detail. Enabling the PrivilegeManager in Firefox As we noted earlier, the PrivilegeManager can be configured not to respond to our programmatic pleas. To find out whether a Firefox browser is configured this way, type about:config into the address bar to reveal the preferences list. Use the filter textbox to find the entry signed.applets.codebase_principal_support. If the value is true, then our code above will work. If not, we won t be able to contact Google. Earlier versions of Mozilla required that the configuration be edited by hand, followed by a complete browser restart. In Firefox, double-clicking the relevant row in the preferences list will toggle the preference value between true and false. Changes made in this way will take place immediately, without needing to restart the browser, or even refresh the page, if the preferences are opened in a separate tab. Signing Mozilla client code Because Internet Explorer bypasses the PrivilegeManager, the application functions smoothly enough in that browser. However, in Mozilla the user is confronted with the scary-looking dialog twice (assuming that the browser is configured to use the PrivilegeManager), making this sort of web service approach rather problematic for Mozilla users. They can prevent it from reappearing by selecting the Remember my decision checkbox (see figure 7.5), but we developers have no control over that (and quite rightly so!). There is a solution, but it requires the application to be packaged in a way that is very specific to Mozilla. Web applications may be signed by digital certificates. To be signed, however, they must be delivered to Mozilla browsers in JAR files, that is, compressed zip archives with all scripts, HTML pages, images, and other resources in one place. JAR files are signed with digital certificates of the variety sold by companies such as Thawte and VeriSign. Resources inside signed JAR files are referred to using a special URL syntax, such as
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jar:http://myserver/mySignedJar.jar|/path/to/someWebPage.html
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When the user downloads a signed web application, they are asked once whether they want to allow it to grant any privileges that it asks for, and that is that.
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