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<a href="#func-members">Functions</a> </div>
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<div class="title">Referrals</div> </div>
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<p>The GASS Transfer API supports referring URL requests to alternate URLs via referrals.
<a href="#details">More...</a></p>
<h2><a name="func-members"></a>
Functions</h2>
<ul>
<li>globus_size_t <a class="el" href="group__globus__gass__transfer__referral.html#ga94a96c132f5e471b146a9645848081ce">globus_gass_transfer_referral_get_count</a> (globus_gass_transfer_referral_t *referral)
<li>char * <a class="el" href="group__globus__gass__transfer__referral.html#ga3bff48d2b5c72ed1c4b7a02aec2089c7">globus_gass_transfer_referral_get_url</a> (globus_gass_transfer_referral_t *referral, globus_size_t index)
<li>int <a class="el" href="group__globus__gass__transfer__referral.html#gae83589cda7d1515d778db2c3a8f8969e">globus_gass_transfer_referral_destroy</a> (globus_gass_transfer_referral_t *referral)
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<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<p>The GASS Transfer API supports referring URL requests to alternate URLs via referrals. </p>
<p>Referrals are essentially pointers to another URL or URLs which contain the same file as the original location which a client has requested of a server. Referrals may span multiple protocol schemes, though not all protocols may be able to generate referrals. For example, an HTTP server may refer a client to another HTTP server, an HTTPS server.</p>
<p>Upon receiving a referred response from a server, a client should query the request handle to determine from where the file can be retrieved. </p>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="ga94a96c132f5e471b146a9645848081ce"></a><!-- doxytag: member="globus_gass_transfer_referral.c::globus_gass_transfer_referral_get_count" ref="ga94a96c132f5e471b146a9645848081ce" args="(globus_gass_transfer_referral_t *referral)" -->
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<td class="memname">globus_size_t globus_gass_transfer_referral_get_count </td>
<td>(</td>
<td class="paramtype">globus_gass_transfer_referral_t * </td>
<td class="paramname"><em>referral</em></td><td>)</td>
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<p>Get the number of URLs in this referral. </p>
<p>This function examines the referral to determine if the number of URLs which are contained in it. Each of these URLs should either point to another referral, or to a URL containing the equivalent file as the original URL request which caused this referral.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">referral</td><td>The referral structure to query.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>This function returns the number of URL entries in the referral, or 0, if there are none. </dd></dl>
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<a class="anchor" id="ga3bff48d2b5c72ed1c4b7a02aec2089c7"></a><!-- doxytag: member="globus_gass_transfer_referral.c::globus_gass_transfer_referral_get_url" ref="ga3bff48d2b5c72ed1c4b7a02aec2089c7" args="(globus_gass_transfer_referral_t *referral, globus_size_t index)" -->
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<td class="memname">char* globus_gass_transfer_referral_get_url </td>
<td>(</td>
<td class="paramtype">globus_gass_transfer_referral_t * </td>
<td class="paramname"><em>referral</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">globus_size_t </td>
<td class="paramname"><em>index</em> </td>
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<td></td>
<td>)</td>
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<p>Get a URL string from a referral. </p>
<p>This function examines the referral to retrieve a URL string from it. A valid referal will contain one or more strings. They are indexed from 0 to the value returned by <a class="el" href="group__globus__gass__transfer__referral.html#ga94a96c132f5e471b146a9645848081ce" title="Get the number of URLs in this referral.">globus_gass_transfer_referral_get_count()</a> - 1.</p>
<p>The string returned by this function must not be freed by the caller. It will remain valid until the referral structure is destroyed.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">referral</td><td>The referral structure to query.</td></tr>
<tr><td class="paramname">index</td><td>The URL to extract from the referral. </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>This function returns a string pointer containing the URL, or NULL if the index or referral were invalid. </dd></dl>
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<a class="anchor" id="gae83589cda7d1515d778db2c3a8f8969e"></a><!-- doxytag: member="globus_gass_transfer_referral.c::globus_gass_transfer_referral_destroy" ref="gae83589cda7d1515d778db2c3a8f8969e" args="(globus_gass_transfer_referral_t *referral)" -->
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<td class="memname">int globus_gass_transfer_referral_destroy </td>
<td>(</td>
<td class="paramtype">globus_gass_transfer_referral_t * </td>
<td class="paramname"><em>referral</em></td><td>)</td>
<td></td>
</tr>
</table>
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<p>Free all memory used by a referral. </p>
<p>This function frees all memory used by this referral. After calling this function, the strings returned by calling <a class="el" href="group__globus__gass__transfer__referral.html#ga3bff48d2b5c72ed1c4b7a02aec2089c7" title="Get a URL string from a referral.">globus_gass_transfer_referral_get_url()</a> must not be accessed. Any further attempts to extract informatoin from this referral will fail.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">referral</td><td>The referral to destroy.</td></tr>
</table>
</dd>
</dl>
<dl><dt><b>Return values:</b></dt><dd>
<table class="retval">
<tr><td class="paramname">GLOBUS_SUCCESS</td><td>The referral was successfully destroyed. </td></tr>
<tr><td class="paramname">GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER</td><td>The referral parameter was GLOBUS_NULL. It could not be destroyed. </td></tr>
</table>
</dd>
</dl>
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