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AWSMetadata.jl
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AWSMetadata.jl
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#==============================================================================#
# AWSMetadata.jl
#
# Amazon Web Service Metadata
#
# This module extracts JSON service metadata from the AWS JavaScript SDK.
#
# Copyright OC Technology Pty Ltd 2017 - All rights reserved
#==============================================================================#
module AWSMetadata
using JSON
using HTTP
using DataStructures
using Retry
github_headers = ["User-Agent" => "https://github.com/JuliaCloud/AWSCore.jl/blob/master/src/AWSMetadata.jl"]
"""
json_parse(d)
Parse JSON to OrderedDict to preserve API and documentation order.
"""
json_parse(d) = JSON.parse(d, dicttype=DataStructures.OrderedDict)
"""
cachehas(file)
cacheget(file)
cacheput(file, data)
Cache for files downloaded from the AWS JavaScript SDK on GitHub.
"""
cachedir() = joinpath(@__DIR__, "aws-sdk-js")
cachehas(file) = isfile(joinpath(cachedir(), file))
cacheget(file) = read(joinpath(cachedir(), file), String)
function cacheput(file, data)
p = joinpath(cachedir(), file)
mkpath(dirname(p))
write(p, data)
end
"""
aws_js_sdk_ls(dirname)
List contents of `dirname` in the AWS JavaScript SDK on GitHub.
"""
function aws_sdk_js_ls(dirname)
cachename = dirname * ".contents"
if cachehas(cachename)
return json_parse(cacheget(cachename))
end
url = "https://api.github.com/repos/aws/aws-sdk-js/contents/$dirname"
println("GET $url...")
r = HTTP.get(url, github_headers)
@assert r.status == 200
r = String(copy(r.body))
cacheput(cachename, r)
return json_parse(r)
end
"""
aws_js_sdk(filename)
Get `filename` from the AWS JavaScript SDK on GitHub.
"""
function aws_sdk_js(filename)
if cachehas(filename * ".404")
throw(HTTP.Response(404))
end
if cachehas(filename)
return cacheget(filename)
end
url = "https://raw.githubusercontent.com/aws/aws-sdk-js/master/$filename"
println("GET $url...")
r = HTTP.get(url, github_headers)
if r.status != 200
if r.status == 404
cacheput(filename * ".404", "")
end
throw(r)
end
r = String(copy(r.body))
cacheput(filename, r)
return r
end
_service_list = OrderedDict()
"""
services()
Dict of services supported by the AWS JavaScript SDK.
"""
function service_list()
global _service_list
if !isempty(_service_list)
return _service_list
end
# Get CamelCase names from metadata.json...
meta = json_parse(aws_sdk_js("apis/metadata.json"))
names = Dict(get(info, "prefix", name) => info["name"]
for (name, info) in meta)
# Get list of API filenames...
files = aws_sdk_js_ls("apis")
filter!(f -> occursin(r".normal.json$", f["name"]), files)
l = Pair[]
for file in files
# Parse prefix and version from filename...
filename = join(split(file["name"], '.')[1:end-2],'.')
filename = split(filename, '-')
version = join(filename[end-2:end], '-')
prefix = join(filename[1:end-3], '-')
push!(l, names[prefix] => Dict("name" => names[prefix],
"version" => version,
"prefix" => prefix))
end
_service_list = OrderedDict(l)
return _service_list
end
"""
service_definition(service)
Get `service-2.json` file for `service`.
e.g. `service_definition(services()["SQS"])`
"""
function service_definition(service)
# Fetch ".normal.json" service definition from AWS JavaScript SDK...
filename = "apis/$(service["prefix"])-$(service["version"]).normal.json"
definition = json_parse(aws_sdk_js(filename))
meta = definition["metadata"]
# Check that service version matches definition metadata...
@assert meta["apiVersion"] == service["version"]
# Check that service definition JSON version is 2.0...
@assert service["prefix"] in ["sdb", "greengrass", "pinpoint"] ||
!haskey(definition, "version") ||
definition["version"] == "2.0"
# Check that signature version is v4...
@assert service["prefix"] in ["s3", "sdb", "importexport"] ||
meta["signatureVersion"] == "v4"
@assert service["prefix"] in ["sdb", "mobileanalytics", "pinpoint"] ||
haskey(meta, "uid")
if !haskey(meta, "uid")
meta["uid"] = meta["endpointPrefix"] * "-" * meta["apiVersion"]
end
# Set signing name to endpoint prefix by default...
if !haskey(meta, "signingName")
meta["signingName"] = meta["endpointPrefix"]
end
# Add source file info...
meta["sourceFile"] = filename
meta["sourceURL"] =
"https://github.com/aws/aws-sdk-js/blob/master/$filename"
@protected try
# Fetch examples...
filename = "apis/$(service["prefix"])-$(service["version"]).examples.json"
definition["examples"] = json_parse(aws_sdk_js(filename))["examples"]
catch e
@ignore if e.status == 404 end
end
@protected try
# Fetch paginators...
filename = "apis/$(service["prefix"])-$(service["version"]).paginators.json"
definition["pagination"] = json_parse(aws_sdk_js(filename))["pagination"]
catch e
@ignore if e.status == 404 end
end
return definition
end
"""
service_summary()
Print summary information about available services.
"""
function service_summary()
services = service_list()
println("$(length(services)) services:")
println(join(keys(services), ", "))
println("")
protocols = Dict{String,Vector{String}}()
sigs = Dict{String,Vector{String}}()
for (name, service) in services
sd = service_definition(service)
meta = sd["metadata"]
pr = meta["protocol"]
sv = meta["signatureVersion"]
haskey(protocols, pr) || (protocols[pr] = String[])
push!(protocols[pr], name)
haskey(sigs, sv) || (sigs[sv] = String[])
push!(sigs[sv], name)
end
println("$(length(protocols)) protocols: $(join(keys(protocols), ", "))")
for (p, l) in protocols
println("$p: ")
println(join(l, ", "))
println("")
end
println("$(length(sigs)) signature versions: $(join(keys(sigs), ", "))")
for (s, l) in sigs
println("$s: ")
println(join(l, ", "))
println("")
end
end
end # module AWSMetadata
#==============================================================================#
# End of file.
#==============================================================================#