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pyroclast 1.0.1
pyroclast
You know what’s awesome? Setting up a REST-ful server you can start with
a single command, out-of-the-box.
You know what’s even cooler? Adding file resources to that server just
by dragging and dropping said files into a folder.
Welcome to pyroclast.
Get Started
To start a Pyroclast instance, simply point the Python interpreter to
the server.py file:
python server.py
Alternatively, you can import server and start an instance manually from
within Python:
from pyroclast import server
server.start()
Once the server is started, you will see a blank HTTP response for
127.0.0.1:1337. This means it’s working!
Get Served
Within the Pyroclast package, the ‘data/’ folder contains all files your
server will host. This can include:
JavaScript Object Notation files (.JSON)
Comma-Seperated Value files (.CSV)
Excel files (.XLS, .XLSX)
SQLite database files (.SQL)
UnQLite database files (.UNQ)
eXtensible Markup Language files (.XML)
To add a file, simply copy it into the Pyroclast package’s ‘data/’
folder and the Pyroclast server will do the rest.
Alternatively, you can serve a file procedurally using the data module’s
serve() function, which will copy directory contents into ‘data/’:
from pyroclast import data
data.serve('/path/to/my/file.xlsx')
Get Your Data
Once your server is up and running, you can query files from a URL based
on the file path relative to ‘data/’–i.e., if ‘test.xlsx’ is in
‘data/’, it is accessed by the URL ‘http://127.0.0.1:1337/test.xlsx’.
All data queried will be returned in one of two formats:
A CSV-formatted text table (for flat data table formats, like .CSV,
.XLS/.XLSX, and .SQL)
A JSON-formatted text tree (for object hierarchy formats, like .JSON,
.XML, and .UNQ)
Specific subsets of data from a source can be selected using the query
segment of the URL (i.e., ?key=value&key2=value2). In addition to
down-selecting the returned data set based on attribute key-value pairs,
there are several format-specific keys that can be used. (Note that
there are no format-specific keys for .JSON, .XML, and .CSV formats).
.XLS/.XLSX
Excel spreadsheets can contain multiple sheets. Pyroclast assumes each
queried sheet is a flat table starting from the first row (a header) and
first column. Specific sheets can be selected in one of two ways:
Passing the name of the desired sheet as the value of the ‘_sheet’
key
Passing the index of the desired sheet (starting with 0) as the value
of the ‘_sheet’ key
In cases where no ‘_sheet’ value is given, Pyroclast will default to
the first sheet in the file.
In cases where sheets are given integer values as names, Pyroclast will
default to the string interpretation.
.SQL
SQLite database files require a query indicate a specific table. This is
done by passing the desired table name as a value of the ‘_table’ key.
If the ‘_table’ key is not specified, an error will be raised.
.UNQ
UnQLite is a funny beast. .UNQ database files can contain both key-value
pairs AND collections of related object hierarchies.
The ‘_collection’ key can be used to indicate a specific collection.
The ‘_key’ key can be used to indicate the key of a specific
key-value pair.
If neither ‘_collection’ or ‘_key’ is indicated, Pyroclast will return
all contents of the database. Key-value pairs will be included in the
response twice:
Once as single-entry dictionaries at the root level of the response
Once as entries to a dictionary assigned to the ‘_root’ key
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