python-simple-rest-api/server.py at main · ynsrc/python-simple-rest-api · GitHub

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importjson
fromhttp.serverimportHTTPServer, BaseHTTPRequestHandler
fromurllib.parseimporturlparse, parse_qs

PORT=5000

classApiRequestHandler(BaseHTTPRequestHandler):

def__init__(self, request, client_address, ref_req, api_ref):
self.api=api_ref
super().__init__(request, client_address, ref_req)

defcall_api(self, method, path, args):
ifpathinapi.routing[method]:
try:
result=api.routing[method][path](args)
self.send_response(200)
self.end_headers()
self.wfile.write(json.dumps(result, indent=4).encode())
exceptExceptionase:
self.send_response(500, "Server Error")
self.end_headers()
self.wfile.write(json.dumps({ "error": e.args }, indent=4).encode())
else:
self.send_response(404, "Not Found")
self.end_headers()
self.wfile.write(json.dumps({"error": "not found"}, indent=4).encode())

defdo_GET(self):
parsed_url=urlparse(self.path)
path=parsed_url.path
args=parse_qs(parsed_url.query)

forkinargs.keys():
iflen(args[k]) ==1:
args[k] =args[k][0]

self.call_api("GET", path, args)

defdo_POST(self):
parsed_url=urlparse(self.path)
path=parsed_url.path
ifself.headers.get("content-type") !="application/json":
self.send_response(400)
self.end_headers()
self.wfile.write(json.dumps({
"error": "posted data must be in json format"
 }, indent=4).encode())
else:
data_len=int(self.headers.get("content-length"))
data=self.rfile.read(data_len).decode()
self.call_api("POST", path, json.loads(data))


classAPI():
def__init__(self):
self.routing= { "GET": { }, "POST": { } }

defget(self, path):
defwrapper(fn):
self.routing["GET"][path] =fn
returnwrapper

defpost(self, path):
defwrapper(fn):
self.routing["POST"][path] =fn
returnwrapper

def__call__(self, request, client_address, ref_request):
api_handler=ApiRequestHandler(request, client_address, ref_request, api_ref=self)
returnapi_handler


api=API()

example_data= {
"items": [
 { "id": 1000, "name": "cat", "description": "cat is meowing" },
 { "id": 1001, "name": "dog", "description": "dog is barking" },
 { "id": 1002, "name": "bird", "description": "bird is singing" }
 ]
}

@api.get("/")
defindex(_):
return {
"name": "Python REST API Example",
"summary": "This is simple REST API architecture with pure Python",
"actions": [ "add", "delete", "list", "search" ],
"version": "1.0.0"
 }


@api.get("/list")
deflist(_):
return {
"count": len(example_data["items"]),
"items": example_data["items"]
 }

@api.get("/search")
defsearch(args):
q=args.get("q", None)

ifqisNone:
return { "error": "q parameter required" }
else:
results= []
foriteminexample_data["items"]:
ifitem["name"].count(q) >0:
results.append(item)
return { "count": len(results), "items": results }


@api.post("/add")
defadd(args):
id=example_data["items"].copy().pop()["id"] +1
name=args.get("name", None)
description=args.get("description", None)

ifnameisNoneordescriptionisNone:
return { "error": "name and description are required parameters" }
else:
item= { "id": id, "name": name, "description": description }
example_data["items"].append(item)
returnitem


@api.post("/delete")
defdelete(args):
id=args.get("id", None)
ifidisNone:
return { "error": "id parameter required" }
else:
item_deleted=False

foriteminexample_data["items"]:
ifitem["id"] ==id:
example_data["items"].remove(item)
item_deleted=True
break

ifitem_deleted:
return { "deleted": id }
else:
return { "error": f"item not found with id {id}" }


if__name__=="__main__":

httpd=HTTPServer(('', PORT), api)
print(f"Application started at http://127.0.0.1:{PORT}/")
httpd.serve_forever()