1 | package oauth.signpost.signature;
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2 |
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3 | import java.util.Iterator;
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4 |
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5 | import oauth.signpost.OAuth;
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6 | import oauth.signpost.http.HttpParameters;
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7 | import oauth.signpost.http.HttpRequest;
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8 |
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9 | /**
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10 | * Writes to a URL query string. <strong>Note that this currently ONLY works
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11 | * when signing a URL directly, not with HTTP request objects.</strong> That's
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12 | * because most HTTP request implementations do not allow the client to change
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13 | * the URL once the request has been instantiated, so there is no way to append
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14 | * parameters to it.
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15 | *
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16 | * @author Matthias Kaeppler
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17 | */
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18 | public class QueryStringSigningStrategy implements SigningStrategy {
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19 |
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20 | private static final long serialVersionUID = 1L;
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21 |
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22 | public String writeSignature(String signature, HttpRequest request,
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23 | HttpParameters requestParameters) {
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24 |
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25 | // add all (x_)oauth parameters
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26 | HttpParameters oauthParams = requestParameters.getOAuthParameters();
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27 | oauthParams.put(OAuth.OAUTH_SIGNATURE, signature, true);
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28 |
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29 | Iterator<String> iter = oauthParams.keySet().iterator();
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30 |
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31 | // add the first query parameter (we always have at least the signature)
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32 | String firstKey = iter.next();
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33 | StringBuilder sb = new StringBuilder(OAuth.addQueryString(request.getRequestUrl(),
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34 | oauthParams.getAsQueryString(firstKey)));
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35 |
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36 | while (iter.hasNext()) {
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37 | sb.append("&");
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38 | String key = iter.next();
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39 | sb.append(oauthParams.getAsQueryString(key));
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40 | }
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41 |
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42 | String signedUrl = sb.toString();
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43 |
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44 | request.setRequestUrl(signedUrl);
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45 |
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46 | return signedUrl;
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47 | }
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48 |
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49 | }
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