Blog API example (#377)

examples/apps/blog/README.md

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+# Blog API in 10 minutes
+
+This is a simple blog API with a function to receive a list of posts and a function to create a post.
+
+## Run it
+
+```
+# Start MySQL:
+docker run --name mysql --net=host -p 3306:3306 -e MYSQL_ROOT_PASSWORD=pass -d mysql:8
+docker run -it --rm --link mysql:mysql mysql mysql -ppass -hmysql -e "create database blog"
+docker run -it --rm --link mysql:mysql mysql mysql -ppass -hmysql -e "show databases"
+
+# create schema
+fn run -e DB_USER=root -e DB_PASS=pass schema
+
+# Test locally:
+# Check if any posts, should be none
+fn run -e DB_USER=root -e DB_PASS=pass posts
+# Add one
+cat post.json | fn run -e DB_USER=root -e DB_PASS=pass posts/create
+# Check again
+fn run -e DB_USER=root -e DB_PASS=pass posts
+
+# Set app configs
+fn apps config set blog DB_USER root
+fn apps config set blog DB_PASS pass
+
+# fn deploy it!
+fn deploy --all
+```
+
+## TODO:
+
+* [ ] Add some way to ignore funcs on deploy, ie: schema

examples/apps/blog/app.yaml

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+name: blog

examples/apps/blog/func.go

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+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+type Person struct {
+	Name string
+}
+
+func main() {
+	p := &Person{Name: "World"}
+	json.NewDecoder(os.Stdin).Decode(p)
+	mapD := map[string]string{
+		"message": fmt.Sprintf("Hello %s", p.Name),
+		"posts":   "http://localhost:8080/r/blog/posts",
+	}
+	mapB, _ := json.Marshal(mapD)
+	fmt.Println(string(mapB))
+}

examples/apps/blog/func.yaml

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+version: 0.0.20
+runtime: go
+entrypoint: ./func
+build_image: ""
+run_image: ""

examples/apps/blog/post.json

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+{
+    "title": "Blog Post 1",
+    "body": "This is the body. This is the body. This is the body. This is the body. This is the body. This is the body. "
+}

examples/apps/blog/posts/Gemfile

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+source 'https://rubygems.org'
+
+gem 'json', '> 2'	
+gem 'sequel'
+gem 'mysql2'

examples/apps/blog/posts/create/Gemfile

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+source 'https://rubygems.org'
+
+gem 'json', '> 2'	
+gem 'sequel'
+gem 'mysql2'

examples/apps/blog/posts/create/func.rb

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+require 'json'
+require 'sequel'
+
+DB = Sequel.connect("mysql2://docker.for.mac.localhost/blog?user=#{ENV['DB_USER']}&password=#{ENV['DB_PASS']}")
+
+payload = STDIN.read
+if payload == ""
+    puts ({"error" => "Invalid input"}).to_json
+    exit 1
+end
+
+payload = JSON.parse(payload)
+
+# create a dataset from the items table
+items = DB[:posts]
+
+# populate the table
+items.insert(:title => payload['title'], :body => payload['body'])
+
+puts ({"status"=>"success", "message" => "Post inserted successfully."}).to_json

examples/apps/blog/posts/create/func.yaml

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+version: 0.0.8
+runtime: ruby
+entrypoint: ruby func.rb
+build_image: treeder/ruby-mysql
+run_image: treeder/ruby-mysql

examples/apps/blog/posts/create/test.json

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+{
+    "tests": [
+        {
+            "input": {
+                "body": {
+                    "name": "Johnny"
+                }
+            },
+            "output": {
+                "body": {
+                    "message": "Hello Johnny"
+                }
+            }
+        },
+        {
+            "input": {
+                "body": ""
+            },
+            "output": {
+                "body": {
+                    "message": "Hello World"
+                }
+            }
+        }
+    ]
+}

examples/apps/blog/posts/func.rb

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+require 'json'
+require 'sequel'
+
+DB = Sequel.connect("mysql2://docker.for.mac.localhost/blog?user=#{ENV['DB_USER']}&password=#{ENV['DB_PASS']}")
+
+items = DB[:posts]
+
+rlist = []
+items.each_with_index do |x,i|
+	STDERR.puts "item: #{x}"
+	rlist << x
+end
+r = {posts: rlist}
+puts r.to_json

examples/apps/blog/posts/func.yaml

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+version: 0.0.2
+runtime: ruby
+entrypoint: ruby func.rb
+build_image: treeder/ruby-mysql
+run_image: treeder/ruby-mysql

examples/apps/blog/posts/test.json

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+{
+    "tests": [
+        {
+            "input": {
+                "body": {
+                    "name": "Johnny"
+                }
+            },
+            "output": {
+                "body": {
+                    "message": "Hello Johnny"
+                }
+            }
+        },
+        {
+            "input": {
+                "body": ""
+            },
+            "output": {
+                "body": {
+                    "message": "Hello World"
+                }
+            }
+        }
+    ]
+}

examples/apps/blog/schema/Gemfile

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+source 'https://rubygems.org'
+
+gem 'json', '> 2'	
+gem 'sequel'
+gem 'mysql2'

examples/apps/blog/schema/create.rb

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+require "sequel"
+
+DB = Sequel.connect("mysql2://docker.for.mac.localhost/blog?user=#{ENV['DB_USER']}&password=#{ENV['DB_PASS']}")
+
+# create a posts table
+DB.create_table :posts do
+  primary_key :id
+  String :title
+  String :body
+end

examples/apps/blog/schema/func.yaml

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+version: 0.0.2
+runtime: ruby
+entrypoint: ruby create.rb
+build_image: treeder/ruby-mysql
+run_image: treeder/ruby-mysql

examples/apps/blog/test.json

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+{
+    "tests": [
+        {
+            "input": {
+                "body": {
+                    "name": "Johnny"
+                }
+            },
+            "output": {
+                "body": {
+                    "message": "Hello Johnny"
+                }
+            }
+        },
+        {
+            "input": {
+                "body": ""
+            },
+            "output": {
+                "body": {
+                    "message": "Hello World"
+                }
+            }
+        }
+    ]
+}