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When Earthdata Login is required for EGI access, EGI requests with very long URLs, for example, those using large shapefiles, can fail if your client program (e.g. curl, wget) has not already logged in and established a session. This is a due to the nature of the OAuth2 authentication process when credentials must be provided. In In this case, it is easy to establish a session prior to sending your request simply by sending an empty request as follows:
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Note: The use of CMR tokens eliminates the need to authenticate via Earthdata Login, so the same URL length limitations do not existsexist.
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