1 files changed, 138 insertions, 0 deletions
diff --git a/tpl/data/data.go b/tpl/data/data.go
new file mode 100644
index 000000000..0c75fdbb7
--- /dev/null
+++ b/tpl/data/data.go
@@ -0,0 +1,138 @@
+// Copyright 2017 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package data
+
+import (
+	"bytes"
+	"encoding/csv"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/gohugoio/hugo/deps"
+	jww "github.com/spf13/jwalterweatherman"
+)
+
+// New returns a new instance of the data-namespaced template functions.
+func New(deps *deps.Deps) *Namespace {
+	return &Namespace{
+		deps:   deps,
+		client: http.DefaultClient,
+	}
+}
+
+// Namespace provides template functions for the "data" namespace.
+type Namespace struct {
+	deps *deps.Deps
+
+	client *http.Client
+}
+
+// GetCSV expects a data separator and one or n-parts of a URL to a resource which
+// can either be a local or a remote one.
+// The data separator can be a comma, semi-colon, pipe, etc, but only one character.
+// If you provide multiple parts for the URL they will be joined together to the final URL.
+// GetCSV returns nil or a slice slice to use in a short code.
+func (ns *Namespace) GetCSV(sep string, urlParts ...string) (d [][]string, err error) {
+	url := strings.Join(urlParts, "")
+
+	var clearCacheSleep = func(i int, u string) {
+		jww.ERROR.Printf("Retry #%d for %s and sleeping for %s", i, url, resSleep)
+		time.Sleep(resSleep)
+		deleteCache(url, ns.deps.Fs.Source, ns.deps.Cfg)
+	}
+
+	for i := 0; i <= resRetries; i++ {
+		var req *http.Request
+		req, err = http.NewRequest("GET", url, nil)
+		if err != nil {
+			jww.ERROR.Printf("Failed to create request for getJSON: %s", err)
+			return nil, err
+		}
+
+		req.Header.Add("Accept", "text/csv")
+		req.Header.Add("Accept", "text/plain")
+
+		var c []byte
+		c, err = ns.getResource(req)
+		if err != nil {
+			jww.ERROR.Printf("Failed to read csv resource %q with error message %s", url, err)
+			return nil, err
+		}
+
+		if !bytes.Contains(c, []byte(sep)) {
+			err = errors.New("Cannot find separator " + sep + " in CSV.")
+			return
+		}
+
+		if d, err = parseCSV(c, sep); err != nil {
+			jww.ERROR.Printf("Failed to parse csv file %s with error message %s", url, err)
+			clearCacheSleep(i, url)
+			continue
+		}
+		break
+	}
+	return
+}
+
+// GetJSON expects one or n-parts of a URL to a resource which can either be a local or a remote one.
+// If you provide multiple parts they will be joined together to the final URL.
+// GetJSON returns nil or parsed JSON to use in a short code.
+func (ns *Namespace) GetJSON(urlParts ...string) (v interface{}, err error) {
+	url := strings.Join(urlParts, "")
+
+	for i := 0; i <= resRetries; i++ {
+		var req *http.Request
+		req, err = http.NewRequest("GET", url, nil)
+		if err != nil {
+			jww.ERROR.Printf("Failed to create request for getJSON: %s", err)
+			return nil, err
+		}
+
+		req.Header.Add("Accept", "application/json")
+
+		var c []byte
+		c, err = ns.getResource(req)
+		if err != nil {
+			jww.ERROR.Printf("Failed to get json resource %s with error message %s", url, err)
+			return nil, err
+		}
+
+		err = json.Unmarshal(c, &v)
+		if err != nil {
+			jww.ERROR.Printf("Cannot read json from resource %s with error message %s", url, err)
+			jww.ERROR.Printf("Retry #%d for %s and sleeping for %s", i, url, resSleep)
+			time.Sleep(resSleep)
+			deleteCache(url, ns.deps.Fs.Source, ns.deps.Cfg)
+			continue
+		}
+		break
+	}
+	return
+}
+
+// parseCSV parses bytes of CSV data into a slice slice string or an error
+func parseCSV(c []byte, sep string) ([][]string, error) {
+	if len(sep) != 1 {
+		return nil, errors.New("Incorrect length of csv separator: " + sep)
+	}
+	b := bytes.NewReader(c)
+	r := csv.NewReader(b)
+	rSep := []rune(sep)
+	r.Comma = rSep[0]
+	r.FieldsPerRecord = 0
+	return r.ReadAll()
+}