NAME

       globus_gass_transfer_client - GASS Transfer Client Operations.

SYNOPSIS

   Functions
       int globus_gass_transfer_register_get (globus_gass_transfer_request_t *request,
           globus_gass_transfer_requestattr_t *attr, char *url, globus_gass_transfer_callback_t
           callback, void *user_arg)
       int globus_gass_transfer_get (globus_gass_transfer_request_t *request,
           globus_gass_transfer_requestattr_t *attr, char *url)
       int globus_gass_transfer_register_put (globus_gass_transfer_request_t *request,
           globus_gass_transfer_requestattr_t *attr, char *url, globus_size_t length,
           globus_gass_transfer_callback_t callback, void *user_arg)
       int globus_gass_transfer_put (globus_gass_transfer_request_t *request,
           globus_gass_transfer_requestattr_t *attr, char *url, globus_size_t length)
       int globus_gass_transfer_register_append (globus_gass_transfer_request_t *request,
           globus_gass_transfer_requestattr_t *attr, char *url, globus_size_t length,
           globus_gass_transfer_callback_t callback, void *user_arg)
       int globus_gass_transfer_append (globus_gass_transfer_request_t *request,
           globus_gass_transfer_requestattr_t *attr, char *url, globus_size_t length)

Detailed Description

       GASS Transfer Client Operations.

       One mode of using the GASS Transfer API is to initiate file transfers. The operations
       supported by the GASS Transfer API are file get, put, and append. These operations are
       provided for HTTP, and HTTPS file servers. The protocol module interface allows support
       for additional protocols to be added easily.

       The GASS transfer library provides both blocking and non-blocking versions of all its
       client functions. When a blocking function completes, or the non-blocking function's
       callback is called, the user should check the request's status to discover whether the
       transfer was completed successfully, denied, or referred.

Function Documentation

   int globus_gass_transfer_append (globus_gass_transfer_request_t * request,
       globus_gass_transfer_requestattr_t * attr, char * url, globus_size_t length)
       Blocking file append.

       This function initiates a new 'append' request of the file named by url. The entire file
       will be transferred to the server if the user is authorized to do so. This function blocks
       until the GASS library has determined whether the file may be retrieved by the caller, may
       not because it is a referral to another URL or URLs, or the server has denied the request.

       Upon returning from this function, the request handle is initialized to refer to the
       append request's state.

       If the server can't store the file at url, but has an alternative location for the user to
       store to, then this function return with request's status set to
       GLOBUS_GASS_TRANSFER_REQUEST_REFERRED.

       Parameters:
           request A pointer to an uninitialized request handle.
           attr Request attributes.
           url URL to append to.
           length The length of the data to append to the url, if known. If this parameter is set
           to GLOBUS_GASS_LENGTH_UNKNOWN, then the append may fail if the protocol does not
           support arbitrarily-length files.

       Return values:
           GLOBUS_SUCCESS The put was successfully initiated.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER One of request, attr, or callback was
           GLOBUS_NULL. The put could not be processed.
           GLOBUS_GASS_TRANSFER_ERROR_INTERNAL_ERROR An internal resource was not available to
           process the put.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_IMPLEMENTED No protocol handler for doing a append on
           this URL type is implemented.
           GLOBUS_GASS_TRANSFER_ERROR_BAD_URL The URL could not be parsed.

       See also:
           globus_gass_transfer_register_append()

   int globus_gass_transfer_get (globus_gass_transfer_request_t * request,
       globus_gass_transfer_requestattr_t * attr, char * url)
       Blocking file get.

       This function initiates a new 'get' request of the file named by url. The entire file will
       be transferred from the server if the file exists and user is authorized to do so. This
       function blocks until the GASS library has determined whether the file may be retrievied
       by the caller, may not because it is a referral to another URL or URLs, or the server has
       denied the request.

       Upon returning from this function, the request handle is initialized to refer to the get
       request's state. This request handle must be destroyed after the user has finished
       processing the data associated with the callback.

       If the file doesn't exist at url, but a referral does, then this function will return with
       the request's status set to GLOBUS_GASS_TRANSFER_REQUEST_REFERRED.

       Parameters:
           request A pointer to an uninitialized request handle.
           attr Request attributes.
           url URL to get

       Return values:
           GLOBUS_SUCCESS The get was successfully initiated.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER One of request or attr was GLOBUS_NULL. The
           get could not be processed.
           GLOBUS_GASS_TRANSFER_ERROR_INTERNAL_ERROR An internal resource was not available to
           process the get.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_IMPLEMENTED No protocol handler for doing a get on this
           URL type is implemented.
           GLOBUS_GASS_TRANSFER_ERROR_BAD_URL The URL could not be parsed.

       See also:
           globus_gass_transfer_register_get()

   int globus_gass_transfer_put (globus_gass_transfer_request_t * request,
       globus_gass_transfer_requestattr_t * attr, char * url, globus_size_t length)
       Blocking file put.

       This function initiates a new 'put' request of the file named by url. The entire file will
       be transferred to the server if the user is authorized to do so. This function blocks
       until the GASS library has determined whether the file may be retrieved by the caller, may
       not because it is a referral to another URL or URLs, or the server has denied the request.

       Upon returning from this function, the request handle is initialized to refer to the put
       request's state.

       If the server can't store the file at url, but has an alternative location for the user to
       store to, then this function return with request's status set to
       GLOBUS_GASS_TRANSFER_REQUEST_REFERRED.

       Parameters:
           request A pointer to an uninitialized request handle.
           attr Request attributes.
           url URL to put.
           length The length of the data to put to the url, if known. If this parameter is set to
           GLOBUS_GASS_LENGTH_UNKNOWN, then the put may fail if the protocol does not support
           arbitrarily-length files.

       Return values:
           GLOBUS_SUCCESS The get was successfully initiated.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER One of request or attr was GLOBUS_NULL. The
           get could not be processed.
           GLOBUS_GASS_TRANSFER_ERROR_INTERNAL_ERROR An internal resource was not available to
           process the get.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_IMPLEMENTED No protocol handler for doing a put on this
           URL type is implemented.
           GLOBUS_GASS_TRANSFER_ERROR_BAD_URL The URL could not be parsed.

       See also:
           globus_gass_transfer_register_put()

   int globus_gass_transfer_register_append (globus_gass_transfer_request_t * request,
       globus_gass_transfer_requestattr_t * attr, char * url, globus_size_t length,
       globus_gass_transfer_callback_t callback, void * user_arg)
       Nonblocking file append.

       This function initiates a new 'append' request of the file named by url. The entire file
       will be transferred to the server if the user is authorized to do so. This function does
       not block; instead, the user's callback function will be called once the GASS library has
       determined whether the file may be stored or not.

       Upon returning from this function, the request handle is initialized to refer to the
       append request's state.

       If the server can't store the file at url, but has an alternative location for the user to
       store to, then the callback function will be called with the request's status set to
       GLOBUS_GASS_TRANSFER_REQUEST_REFERRED.

       Parameters:
           request A pointer to an uninitialized request handle.
           attr Request attributes.
           url URL to append to.
           length The length of the data to append to the url, if known. If this parameter is set
           to GLOBUS_GASS_LENGTH_UNKNOWN, then the append may fail if the protocol does not
           support arbitrarily-length files.
           callback Function to call once the URL has been accepted, referred, or denied by the
           server.
           user_arg User-supplied argument to the callback function.

       Return values:
           GLOBUS_SUCCESS The put was successfully initiated.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER One of request, attr, or callback was
           GLOBUS_NULL. The put could not be processed.
           GLOBUS_GASS_TRANSFER_ERROR_INTERNAL_ERROR An internal resource was not available to
           process the put.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_IMPLEMENTED No protocol handler for doing a append on
           this URL type is implemented.
           GLOBUS_GASS_TRANSFER_ERROR_BAD_URL The URL could not be parsed.

       See also:
           globus_gass_transfer_append()

   int globus_gass_transfer_register_get (globus_gass_transfer_request_t * request,
       globus_gass_transfer_requestattr_t * attr, char * url, globus_gass_transfer_callback_t
       callback, void * user_arg)
       Nonblocking file get.

       This function initiates a new 'get' request of the file named by url. The entire file will
       be transferred from the server if the file exists and user is authorized to do so. This
       function does not block; instead, the user's callback function will be called once the
       GASS library has determined whether the file can be retrieved or not.

       Upon returning from this function, the request handle is initialized to refer to the get
       request's state.

       If the server can't store the file at url, but has an alternative location for the user to
       store to, then the callback function will be called with the request's status set to
       GLOBUS_GASS_TRANSFER_REQUEST_REFERRED.

       Parameters:
           request A pointer to an uninitialized request handle.
           attr Request attributes.
           url URL to get
           callback Function to call once the URL has been accepted, referred, or denied by the
           server.
           user_arg User-supplied argument to the callback function.

       Return values:
           GLOBUS_SUCCESS The get was successfully initiated.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER One of request, attr, or callback was
           GLOBUS_NULL. The get could not be processed.
           GLOBUS_GASS_TRANSFER_ERROR_INTERNAL_ERROR An internal resource was not available to
           process the get.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_IMPLEMENTED No protocol handler for doing a get on this
           URL type is implemented.
           GLOBUS_GASS_TRANSFER_ERROR_BAD_URL The URL could not be parsed.

       See also:
           globus_gass_transfer_get()

   int globus_gass_transfer_register_put (globus_gass_transfer_request_t * request,
       globus_gass_transfer_requestattr_t * attr, char * url, globus_size_t length,
       globus_gass_transfer_callback_t callback, void * user_arg)
       Nonblocking file put.

       This function initiates a new 'put' request of the file named by url. The entire file will
       be transferred to the server if the user is authorized to do so. This function does not
       block; instead, the user's callback function will be called once the GASS library has
       determined whether the file may be stored or not.

       Upon returning from this function, the request handle is initialized to refer to the put
       request's state.

       If the server can't store the file at url, but has an alternative location for the user to
       store to, then the callback function will be called with the request's status set to
       GLOBUS_GASS_TRANSFER_REQUEST_REFERRED.

       Parameters:
           request A pointer to an uninitialized request handle.
           attr Request attributes.
           url URL to put.
           length The length of the data to put to the url, if known. If this parameter is set to
           GLOBUS_GASS_LENGTH_UNKNOWN, then the put may fail if the protocol does not support
           arbitrarily-length files.
           callback Function to call once the URL has been accepted, referred, or denied by the
           server.
           user_arg User-supplied argument to the callback function.

       Return values:
           GLOBUS_SUCCESS The put was successfully initiated.
           GLOBUS_GASS_TRANSFER_ERROR_NULL_POINTER One of request, attr, or callback was
           GLOBUS_NULL. The put could not be processed.
           GLOBUS_GASS_TRANSFER_ERROR_INTERNAL_ERROR An internal resource was not available to
           process the put.
           GLOBUS_GASS_TRANSFER_ERROR_NOT_IMPLEMENTED No protocol handler for doing a put on this
           URL type is implemented.
           GLOBUS_GASS_TRANSFER_ERROR_BAD_URL The URL could not be parsed.

       See also:
           globus_gass_transfer_put()

Author

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