1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
require "json"
require "./handler"
module Guff
module APIMethods
API = {
"post": {
"get_posts": {
text: "Get posts matching query.",
args: {
"q": {
text: "Search string.",
type: :text,
required: false,
default: "",
},
"page": {
text: "Page number",
type: :int,
required: false,
default: "1",
},
"tags": {
text: "Comma-separated list of tags (union)",
type: :tags,
required: false,
default: "1",
},
"sort": {
text: "Sort order of results",
type: :sort,
required: false,
default: "date,desc",
},
},
},
},
"test": {
"version": {
text: "Get version",
},
"get_posts": {
text: "Test get posts",
},
"error": {
text: "Test error response",
},
}
}
TYPE_CHECKS = {
text: /.*/,
int: /^\d+$/,
tags: /^[a-z0-9_,-]+$/,
sort: /^[a-z0-9_]+,(?:asc|desc)$/,
}
private def get_method_args(
params : HTTP::Params,
namespace : String,
method : String
)
return {} of String => String unless (
API[namespace]? &&
API[namespace][method] &&
API[namespace][method][:args]?
)
# get method args
args = API[namespace][method][:args] as \
Hash(String, Hash(Symbol, String | Symbol | Bool))
args.keys.reduce({} of String => String) do |r, arg_name|
arg_data = args[arg_name] as Hash(Symbol, String|Symbol|Bool)
# check for required parameter
if arg_data[:required] && !params.has_key?(arg_name)
raise "missing required parameter: %s" % [arg_name]
end
# get value
val = params.fetch(arg_name, arg_data[:default] as String)
# check value
if !TYPE_CHECKS[arg_data[:type]].match(val)
raise "invalid parameter format: %s" % [arg_name]
end
# add value to result
r[arg_name] = val
# return result
r
end
end
################
# post methods #
################
private def do_post_get_posts(
context : HTTP::Server::Context,
args : Hash(String, String)
)
[{foo: "bar"}, {foo: "asdf"}].to_json
end
################
# test methods #
################
private def do_test_version(
context : HTTP::Server::Context,
args : Hash(String, String)
)
{version: Guff::VERSION}.to_json
end
private def do_test_get_posts(
context : HTTP::Server::Context,
args : Hash(String, String)
)
[{foo: "bar"}, {foo: "asdf"}].to_json
end
private def do_test_error(
context : HTTP::Server::Context,
args : Hash(String, String)
)
raise "some random error"
end
end
end
|
