Quickstart: Search the web using the Bing Web Search REST API and Go
Use this quickstart to make your first call to the Bing Web Search API. This Go application sends a search request to the API, and shows the JSON response. Although this application is written in Go, the API is a RESTful Web service compatible with most programming languages.
The code examples in this quickstart require only core libraries; there are no external dependencies.
Prerequisites
Here are a few things that you'll need before running this quickstart:
- Go binaries
- A subscription key
Create a project and import core libraries
Create a new Go project in your favorite IDE or editor. Then, import net/http for requests, ioutil to read the response, time and encoding/json to handle the JSON, and fmt to print the output.
package main
import (
"fmt"
"net/http"
"io/ioutil"
"time"
"encoding/json"
)
Create a struct to format the search results
The BingAnswer struct formats the data provided in the response.
// This struct formats the answers provided by the Bing Web Search API.
type BingAnswer struct {
Type string `json:"_type"`
QueryContext struct {
OriginalQuery string `json:"originalQuery"`
} `json:"queryContext"`
WebPages struct {
WebSearchURL string `json:"webSearchUrl"`
TotalEstimatedMatches int `json:"totalEstimatedMatches"`
Value []struct {
ID string `json:"id"`
Name string `json:"name"`
URL string `json:"url"`
IsFamilyFriendly bool `json:"isFamilyFriendly"`
DisplayURL string `json:"displayUrl"`
Snippet string `json:"snippet"`
DateLastCrawled time.Time `json:"dateLastCrawled"`
SearchTags []struct {
Name string `json:"name"`
Content string `json:"content"`
} `json:"searchTags,omitempty"`
About []struct {
Name string `json:"name"`
} `json:"about,omitempty"`
} `json:"value"`
} `json:"webPages"`
RelatedSearches struct {
ID string `json:"id"`
Value []struct {
Text string `json:"text"`
DisplayText string `json:"displayText"`
WebSearchURL string `json:"webSearchUrl"`
} `json:"value"`
} `json:"relatedSearches"`
RankingResponse struct {
Mainline struct {
Items []struct {
AnswerType string `json:"answerType"`
ResultIndex int `json:"resultIndex"`
Value struct {
ID string `json:"id"`
} `json:"value"`
} `json:"items"`
} `json:"mainline"`
Sidebar struct {
Items []struct {
AnswerType string `json:"answerType"`
Value struct {
ID string `json:"id"`
} `json:"value"`
} `json:"items"`
} `json:"sidebar"`
} `json:"rankingResponse"`
}
Declare the main function and define variables
This code declares the main function and sets the required variables:
Confirm that the endpoint is correct and replace the
tokenvalue with a valid subscription key from your Azure account.Optionally, customize the search query by replacing the value for
searchTerm.
// Declare the main function. This is required for all Go programs.
func main() {
// Replace the token string with a valid subscription key.
const endpoint = "https://api.bing.microsoft.com/v7.0/search"
token := "YOUR-ACCESS-KEY"
searchTerm := "Microsoft Bing Search Services"
// The remaining code in this quickstart goes in the main function.
}
Construct a request
This code declares the HTTP request, inserts the header and payload, and instantiates the client.
// Declare a new GET request.
req, err := http.NewRequest("GET", endpoint, nil)
if err != nil {
panic(err)
}
// Add the payload to the request.
param := req.URL.Query()
param.Add("q", searchTerm)
req.URL.RawQuery = param.Encode()
// Insert the request header.
req.Header.Add("Ocp-Apim-Subscription-Key", token)
// Instantiate a client.
client := new(http.Client)
Make a request
Use this code to call the Bing Web Search API and close the connection after a response is returned.
// Send the request to Bing.
resp, err := client.Do(req)
if err != nil {
panic(err)
}
// Close the connection.
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
panic(err)
}
Handle the response
Use the struct we created previously to format the response and print the search results.
// Create a new answer.
ans := new(BingAnswer)
err = json.Unmarshal(body, &ans)
if err != nil {
fmt.Println(err)
}
// Iterate over search results and print the result name and URL.
for _, result := range ans.WebPages.Value {
fmt.Println(result.Name, "||", result.URL)
}
Put it all together
The last step is to validate your code and run it. If you'd like to compare your code with ours, here's the complete program:
package main
import (
"fmt"
"net/http"
"io/ioutil"
"time"
"encoding/json"
)
// The is the struct for the data returned by Bing.
type BingAnswer struct {
Type string `json:"_type"`
QueryContext struct {
OriginalQuery string `json:"originalQuery"`
} `json:"queryContext"`
WebPages struct {
WebSearchURL string `json:"webSearchUrl"`
TotalEstimatedMatches int `json:"totalEstimatedMatches"`
Value []struct {
ID string `json:"id"`
Name string `json:"name"`
URL string `json:"url"`
IsFamilyFriendly bool `json:"isFamilyFriendly"`
DisplayURL string `json:"displayUrl"`
Snippet string `json:"snippet"`
DateLastCrawled time.Time `json:"dateLastCrawled"`
SearchTags []struct {
Name string `json:"name"`
Content string `json:"content"`
} `json:"searchTags,omitempty"`
About []struct {
Name string `json:"name"`
} `json:"about,omitempty"`
} `json:"value"`
} `json:"webPages"`
RelatedSearches struct {
ID string `json:"id"`
Value []struct {
Text string `json:"text"`
DisplayText string `json:"displayText"`
WebSearchURL string `json:"webSearchUrl"`
} `json:"value"`
} `json:"relatedSearches"`
RankingResponse struct {
Mainline struct {
Items []struct {
AnswerType string `json:"answerType"`
ResultIndex int `json:"resultIndex"`
Value struct {
ID string `json:"id"`
} `json:"value"`
} `json:"items"`
} `json:"mainline"`
Sidebar struct {
Items []struct {
AnswerType string `json:"answerType"`
Value struct {
ID string `json:"id"`
} `json:"value"`
} `json:"items"`
} `json:"sidebar"`
} `json:"rankingResponse"`
}
// Replace the token string with a valid subscription key.
func main() {
const endpoint = "https://api.bing.microsoft.com/v7.0/search"
token := "YOUR-ACCESS-KEY"
searchTerm := "Microsoft Cognitive Services"
// Declare a new GET request.
req, err := http.NewRequest("GET", endpoint, nil)
if err != nil {
panic(err)
}
// Add the payload to the request.
param := req.URL.Query()
param.Add("q", searchTerm)
req.URL.RawQuery = param.Encode()
// Insert the request header.
req.Header.Add("Ocp-Apim-Subscription-Key", token)
// Create a new client.
client := new(http.Client)
// Send the request to Bing.
resp, err := client.Do(req)
if err != nil {
panic(err)
}
// Close the response.
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
panic(err)
}
// Create a new answer.
ans := new(BingAnswer)
err = json.Unmarshal(body, &ans)
if err != nil {
fmt.Println(err)
}
// Iterate over search results and print the result name and URL.
for _, result := range ans.WebPages.Value {
fmt.Println(result.Name, "||", result.URL)
}
}
Example JSON response
Responses from the Bing Web Search API are returned as JSON. This sample response has been formatted by using the BingAnswer struct and shows the result.Name and result.URL.
Microsoft Cognitive Services || https://www.microsoft.com/cognitive-services
Cognitive Services | Microsoft Azure || https://azure.microsoft.com/services/cognitive-services/
What is Microsoft Cognitive Services? | Microsoft Docs || https://learn.microsoft.com/azure/cognitive-services/Welcome
Microsoft Cognitive Toolkit || https://www.microsoft.com/en-us/cognitive-toolkit/
Microsoft Customers || https://customers.microsoft.com/en-us/search?sq=%22Microsoft%20Cognitive%20Services%22&ff=&p=0&so=story_publish_date%20desc
Microsoft Enterprise Services - Microsoft Enterprise || https://enterprise.microsoft.com/en-us/services/
Microsoft Cognitive Services || https://westus.dev.cognitive.microsoft.com/docs/services/563879b61984550e40cbbe8d/operations/563879b61984550f30395236
Cognitive Services - msdn.microsoft.com || https://msdn.microsoft.com/magazine/mt742868.aspx