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POGoogle Calendar API - can only update event once
 

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  1. POGoogle Calendar API - can only update event once
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    <p>I've encountered the same problem as described in this post:</p> <p><a href="https://stackoverflow.com/questions/8574088/google-calendar-api-v3-re-update-issue">Google Calendar api v3 re-update issue</a></p> <p>Namely, once I create an event and update it once using the Google Calendar API (v3), I am no longer able to update the event. When I attempt to, I get a 400 - Invalid value response. (FWIW I'm working in PHP).</p> <p>Following a lead offered in the post I referenced above, I attempted to solve the issue using etags (though admittedly my grasp of how they work is limited). Basically, on event update, the API returns an etag in its response, which I now save in my database. Then for subsequent (n > 1) updates, I pull the current etag from the database and include it in the http header:</p> <pre><code>Content-Type: application/json Authorization: OAuth [token] If-Match: [etag] </code></pre> <p>This follows info under the "Updating Entries" header here: <a href="http://code.google.com/apis/gdata/docs/2.0/reference.html#ResourceVersioning" rel="nofollow noreferrer">http://code.google.com/apis/gdata/docs/2.0/reference.html#ResourceVersioning</a></p> <p>Sidenote: in the google ref above, the If-Match header is shown as</p> <pre><code>If-Match: "S0wCTlpIIip7ImA0X0QI" </code></pre> <p>with double quotes around the etag. I'm saving the etags in the database with double quotes, exactly as I receive them in first update response. Do I need to escape the quotes or anything when adding to the header using curl_setopt/HTTPHEADER?</p> <p>Despite implementing this etag If-Match thing, I'm still getting the same 400 - Invalid value response. I know that my request bodies are valid because the first update works fine. There's just some additional issue surrounding subsequent updates.</p> <p>Any help much appreciated.</p>
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    1. COAre you following the instructions which say "To update an entry using If-Match, start by acquiring the entry you're updating. Make any desired changes to the entry, then create a new PUT request containing the modified entry."
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    2. COThanks for following up. I just ended up implementing an "update" where I delete the existing event and create a new one.
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