Upload Salesforce Static Resource to Aspose Storage

AsposeStorage.page

<apex:page controller="AsposeStorageController">
<apex:form id="theForm">
    <apex:pageBlock title="Requirements" rendered="true">
        <ol>
            <li>Register aspose account.</li>            
            <li>Fill in the form below and click Run Sample (all fields are required).</li>
        </ol>
    </apex:pageBlock>
    <apex:pageBlock title="Upload Static Resources to Aspose Storage" rendered="true">
        <table>
            <tr>
                <td><b>App SID:</b></td>
                <td><apex:inputText value="{!appSID}" size="100"/></td>
            </tr>
            <tr>
                <td><b>App Key:</b></td>
                <td><apex:inputText value="{!appKey}" size="100"/></td>
            </tr>
            <tr>
                <td><b>Resource Name:</b></td>
                <td><apex:inputText value="{!fileName}" size="100"/></td>
            </tr>
            <tr>
                <td><b>Save Format:</b> (pdf,tiff,html)</td>
                <td><apex:inputText value="{!saveFormat}" size="100"/></td>
            </tr>
        </table>
        
        <div class="container">
            <apex:commandButton action="{!runSample}" value="Run Sample" /><br/>
            <p>
                <span>Output: </span>
                <apex:outputLabel >{!output}</apex:outputLabel>
            </p>
        </div>
    </apex:pageBlock>
</apex:form>
</apex:page>

AsposeStorageController.cls

public with sharing class AsposeStorageController {

    public string appSID {get; set;}
    public string appKey {get; set;}
    public string fileName {get; set;}
    public string saveFormat {get; set;}
    public string output {get; set;}


    public PageReference runSample() {
        Product.BaseProductUri = 'http://api.aspose.com/v1.1';
        AsposeCloudApp.setAppInfo(appKey, appSID);
        
        //build URI
        String strURI = Product.BaseProductUri + '/storage/file/' + Filename + '.' + saveFormat;
        String signedURI = Utils.Sign(strURI);
        
        Blob contents = [select id,body from StaticResource Where Name = :Filename].body;
        
        String strJSON = Utils.ProcessCommand(signedURI, 'PUT',contents);
                
        
        this.output = strJSON; 
        
        return null;
    }
}

Product.cls

public with sharing class Product {
    
    public static String BaseProductUri { get; set; }
    
}

Utils.cls

public with sharing class Utils {
    
    public static String Sign(String data) {
        String HMAC_SHA1 = 'HmacSHA1';
        try {
            data = data.replace(' ', '%20');
            
            URL url = new URL(data);
            String path = url.getPath();
            path = path.replace(' ', '%20');

            // Remove final slash here as it can be added automatically.
            path = path.removeEnd('/');
            
            String filePart = url.getPath() + (url.getQuery() == null ? '?' : '?' + url.getQuery()) + '&appSID=' + AsposeCloudApp.AppSID;
            url = new URL(url.getProtocol(), url.getHost(), url.getPort(), filePart);

            // compute the hmac on input data bytes
            Blob mac = Crypto.generateMac(HMAC_SHA1, Blob.valueOf(url.toExternalForm()), Blob.valueOf(AsposeCloudApp.AppKey));
            String base64 = EncodingUtil.base64Encode(mac);
            system.debug('base64: ' + base64);
            // Remove invalid symbols.
            String result = base64.substring(0, base64.length() - 1);
            
            result = EncodingUtil.urlEncode(result, 'UTF-8');
            system.debug('signature: ' + result);

            String encodedUrl = url.toExternalForm() + '&signature=' + result;
            system.debug('full URL: ' + encodedUrl);
            
            return encodedUrl;
        } catch (Exception ex) {
            system.debug(ex.getStackTraceString());
            return null;
        }
    }
    
    public static String ProcessCommand(String strURI, String strHttpCommand, Blob content, String ContentType) {
        try {
            HttpRequest request = new HttpRequest();
            Integer len = 0;
            if (strContent != null) {
                request.setBodyAsBlob(content);
            }
            
            request.setEndpoint(strURI);
            request.setMethod(strHttpCommand);
            
            if (ContentType.toLowerCase() == 'xml')
                request.setHeader('Content-Type', 'application/xml');
            else
                request.setHeader('Content-Type', 'application/json');
            
            request.setHeader('Accept', 'application/json');
            //request.setTimeout(Timeout);

            Http http = new Http();
            HttpResponse res = http.send(request);
            return res.getBody();
        } catch (Exception ex) {
            system.debug('HTTP ERROR' + ex.getMessage());
            system.debug(ex.getStackTraceString());
            return null;
        }
    }
}