# Perseus RESTful API Client Python Library
Repository of classes that provide Pythonic interfaces to connect to a RESTful API server developed with Perseus RESTful API server framework.
## Python Library `Poster 0.8.1`
Note: this library includes a modified version of `poster 0.8.1`, which original version provides a set of classes and functions to facilitate making HTTP POST (or PUT) requests using the standard multipart/form-data encoding.
The original library `poster 0.8.1` cannot be used to upload file uploaded into memory (i.e., stream-to-memory), like for instance django `InMemoryUploadedFile`. The reason is that such file-like object doesn't support the method `fileno()` used by the `poster 0.8.1` to determine the size of the file-like object to upload in Python module `poster.encode`:
```python
if fileobj is not None and filesize is None:
# Try and determine the file size
try:
self.filesize = os.fstat(fileobj.fileno()).st_size
except (OSError, AttributeError):
try:
fileobj.seek(0, 2)
self.filesize = fileobj.tell()
fileobj.seek(0)
except:
raise ValueError("Could not determine filesize")
```
This code raises the exception `io.UnsupportedOperation` that `poster 0.8.1` doesn't catch. Chris AtLee included Alon Hammerman's patch in the tag `tip` of the library ``poster`, for catching the`io.UnsupportedOperation for fileno` on 2013-03-12:
```python
try:
from io import UnsupportedOperation
except ImportError:
UnsupportedOperation = None
(...)
if fileobj is not None and filesize is None:
# Try and determine the file size
try:
self.filesize = os.fstat(fileobj.fileno()).st_size
except (OSError, AttributeError, UnsupportedOperation):
try:
fileobj.seek(0, 2)
self.filesize = fileobj.tell()
fileobj.seek(0)
except:
raise ValueError("Could not determine filesize")
```
However, the latest version of `poster` installable with `pip` is still `0.8.1`.
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