Download as PDF, PPTX
![Text + Data Collections
const (
letter = `Dear {{range .}}{{.}}, {{end}} How are you?`
)
tmpl, err := template.New("letter").Parse(letter)
tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"})](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-5-2048.jpg)
![Text + Data Collections
const (
letter = `Dear {{range .}}{{.}}, {{end}} How are you?`
)
tmpl, err := template.New("letter").Parse(letter)
tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"})
Dear Harry, Jane, Lisa, George, How are you?](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-6-2048.jpg)
![Text + Data + Logic
var funcMap = template.FuncMap{
"increment": increment,
}
func increment(x int) int {
return x + 1
}
const (
letter = `Dear {{with $names := .}}
{{- range $i, $val := $names}}
{{- if lt (increment $i) (len $names)}}
{{- $val}}, {{else -}} and {{$val}}{{end}}
{{- end}}{{end}}; How are you?`
)
tmpl, err := template.New("letter").Funcs(funcMap).Parse(letter)
tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"})](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-7-2048.jpg)
![Text + Data + Logic
var funcMap = template.FuncMap{
"increment": increment,
}
func increment(x int) int {
return x + 1
}
const (
letter = `Dear {{with $names := .}}
{{- range $i, $val := $names}}
{{- if lt (increment $i) (len $names)}}
{{- $val}}, {{else -}} and {{$val}}{{end}}
{{- end}}{{end}}; How are you?`
)
tmpl, err := template.New("letter").Funcs(funcMap).Parse(letter)
tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"})
Dear Harry, Jane, Lisa, and George; How are you?](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-8-2048.jpg)
![Text + Data Structuresconst (
letter = `------------------------------
{{range .}}{{.FirstName}} {{.LastName}}
{{.Street}}
{{.City}}, {{.State}} {{.Zip}}
Dear {{.FirstName}},
How are you?
------------------------------
{{end}}`
)
tmpl, err := template.New("letter").Parse(letter)
harry := Person{
FirstName: "Harry",
LastName: "Jones",
Street: "1234 Main St.",
City: "Springfield",
State: "IL",
Zip: "12345-6789",
}
tmpl.Execute(os.Stdout, []Person{harry, jane})](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-9-2048.jpg)
![Text + Data Structuresconst (
letter = `------------------------------
{{range .}}{{.FirstName}} {{.LastName}}
{{.Street}}
{{.City}}, {{.State}} {{.Zip}}
Dear {{.FirstName}},
How are you?
------------------------------
{{end}}`
)
tmpl, err := template.New("letter").Parse(letter)
harry := Person{
FirstName: "Harry",
LastName: "Jones",
Street: "1234 Main St.",
City: "Springfield",
State: "IL",
Zip: "12345-6789",
}
tmpl.Execute(os.Stdout, []Person{harry, jane})
------------------------------
Harry Jones
1234 Main St.
Springfield, IL 12345-6789
Dear Harry,
How are you?
------------------------------
Jane Sherman
8511 1st Ave.
Dayton, OH 18515-6261
Dear Jane,
How are you?
------------------------------](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-10-2048.jpg)
![HTML + Data Structuresconst (
letter = `<html><body><table>
<tr><th></th><th>Name</th><th>Address</th></tr>
{{range .}}
<tr>
<td><img src="{{.AvatarUrl}}"></td>
<td>{{.FirstName}} {{.LastName}}</td>
<td>{{.Street}}, {{.City}}, {{.State}} {{.Zip}}</td>
</tr>
{{end}}
</table></body></html>`
)
tmpl, err := template.New("letter").Parse(letter)
tmpl.Execute(os.Stdout, []Person{harry, jane})](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-12-2048.jpg)
![HTML + Data Structuresconst (
letter = `<html><body><table>
<tr><th></th><th>Name</th><th>Address</th></tr>
{{range .}}
<tr>
<td><img src="{{.AvatarUrl}}"></td>
<td>{{.FirstName}} {{.LastName}}</td>
<td>{{.Street}}, {{.City}}, {{.State}} {{.Zip}}</td>
</tr>
{{end}}
</table></body></html>`
)
tmpl, err := template.New("letter").Parse(letter)
tmpl.Execute(os.Stdout, []Person{harry, jane})](https://image.slidesharecdn.com/templating-160622030518/75/Templating-in-Go-13-2048.jpg)
Uploaded byStephen Rudolph
Templating in Go
The document discusses templating in Go, including merging text and data using the text/template package, using functions and logic in templates, and structuring templates to work with complex data structures. It also covers generating HTML output and securing templates against malicious input that could lead to script injection attacks. Templates provide a way to dynamically generate output through separating data and presentation and merging them according to the template syntax.
![[SyncNorwich] ubisend, joe dixon "Chatbots and multi-channel conversations"](https://cdn.slidesharecdn.com/ss_thumbnails/syncnorwich-ubisendjoedixon-chatbotsandmulti-channelconversations-170125152242-thumbnail.jpg?width=640&height=640&fit=bounds)
Templating in Go
- 1. Templating in Go GoDFWLightning Talks - 6/21/16 Stephen Rudolph
- 2.
- 3. Merging Text +Data const ( letter = `Dear {{.}}, How are you?` ) tmpl, err := template.New("letter").Parse(letter) tmpl.Execute(os.Stdout, "Professor Jones")
- 4. Merging Text +Data const ( letter = `Dear {{.}}, How are you?` ) tmpl, err := template.New("letter").Parse(letter) tmpl.Execute(os.Stdout, "Professor Jones") Dear Professor Jones, How are you?
- 5. Text + DataCollections const ( letter = `Dear {{range .}}{{.}}, {{end}} How are you?` ) tmpl, err := template.New("letter").Parse(letter) tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"})
- 6. Text + DataCollections const ( letter = `Dear {{range .}}{{.}}, {{end}} How are you?` ) tmpl, err := template.New("letter").Parse(letter) tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"}) Dear Harry, Jane, Lisa, George, How are you?
- 7. Text + Data+ Logic var funcMap = template.FuncMap{ "increment": increment, } func increment(x int) int { return x + 1 } const ( letter = `Dear {{with $names := .}} {{- range $i, $val := $names}} {{- if lt (increment $i) (len $names)}} {{- $val}}, {{else -}} and {{$val}}{{end}} {{- end}}{{end}}; How are you?` ) tmpl, err := template.New("letter").Funcs(funcMap).Parse(letter) tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"})
- 8. Text + Data+ Logic var funcMap = template.FuncMap{ "increment": increment, } func increment(x int) int { return x + 1 } const ( letter = `Dear {{with $names := .}} {{- range $i, $val := $names}} {{- if lt (increment $i) (len $names)}} {{- $val}}, {{else -}} and {{$val}}{{end}} {{- end}}{{end}}; How are you?` ) tmpl, err := template.New("letter").Funcs(funcMap).Parse(letter) tmpl.Execute(os.Stdout, []string{"Harry", "Jane", "Lisa", "George"}) Dear Harry, Jane, Lisa, and George; How are you?
- 9. Text + DataStructuresconst ( letter = `------------------------------ {{range .}}{{.FirstName}} {{.LastName}} {{.Street}} {{.City}}, {{.State}} {{.Zip}} Dear {{.FirstName}}, How are you? ------------------------------ {{end}}` ) tmpl, err := template.New("letter").Parse(letter) harry := Person{ FirstName: "Harry", LastName: "Jones", Street: "1234 Main St.", City: "Springfield", State: "IL", Zip: "12345-6789", } tmpl.Execute(os.Stdout, []Person{harry, jane})
- 10. Text + DataStructuresconst ( letter = `------------------------------ {{range .}}{{.FirstName}} {{.LastName}} {{.Street}} {{.City}}, {{.State}} {{.Zip}} Dear {{.FirstName}}, How are you? ------------------------------ {{end}}` ) tmpl, err := template.New("letter").Parse(letter) harry := Person{ FirstName: "Harry", LastName: "Jones", Street: "1234 Main St.", City: "Springfield", State: "IL", Zip: "12345-6789", } tmpl.Execute(os.Stdout, []Person{harry, jane}) ------------------------------ Harry Jones 1234 Main St. Springfield, IL 12345-6789 Dear Harry, How are you? ------------------------------ Jane Sherman 8511 1st Ave. Dayton, OH 18515-6261 Dear Jane, How are you? ------------------------------
- 11.
- 12. HTML + DataStructuresconst ( letter = `<html><body><table> <tr><th></th><th>Name</th><th>Address</th></tr> {{range .}} <tr> <td><img src="{{.AvatarUrl}}"></td> <td>{{.FirstName}} {{.LastName}}</td> <td>{{.Street}}, {{.City}}, {{.State}} {{.Zip}}</td> </tr> {{end}} </table></body></html>` ) tmpl, err := template.New("letter").Parse(letter) tmpl.Execute(os.Stdout, []Person{harry, jane})
- 13. HTML + DataStructuresconst ( letter = `<html><body><table> <tr><th></th><th>Name</th><th>Address</th></tr> {{range .}} <tr> <td><img src="{{.AvatarUrl}}"></td> <td>{{.FirstName}} {{.LastName}}</td> <td>{{.Street}}, {{.City}}, {{.State}} {{.Zip}}</td> </tr> {{end}} </table></body></html>` ) tmpl, err := template.New("letter").Parse(letter) tmpl.Execute(os.Stdout, []Person{harry, jane})
- 14. HTML + MaliciousData harry := Person{ FirstName: `Harry<script>alert("You've been hacked!")</script>`, LastName: "Jones", Street: "1234 Main St.", City: "Springfield", State: "IL", Zip: "12345-6789", AvatarUrl: "harry.png", }
- 15. HTML + MaliciousData harry := Person{ FirstName: `Harry<script>alert("You've been hacked!")</script>`, LastName: "Jones", Street: "1234 Main St.", City: "Springfield", State: "IL", Zip: "12345-6789", AvatarUrl: "harry.png", }
- 16. Text + MaliciousData harry := Person{ FirstName: `Harry<script>alert("You've been hacked!")</script>`, LastName: "Jones", Street: "1234 Main St.", City: "Springfield", State: "IL", Zip: "12345-6789", AvatarUrl: "harry.png", }