func TestScraper(t *testing.T) {
Convey("Testing the scraper to search within wikipedia", t, func() {
rb := new(scraper.RequestBit)
rb.Url = "https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=" + url.QueryEscape("database") + "&format=json"
rb.ResponseObjectInterface = new(requestStruct.WikiSearch)
rb.Work()
response := *rb.ResponseObjectInterface.(*requestStruct.WikiSearch)
Convey("should have the correct url", func() {
So(rb.Url, ShouldEqual, "https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=database&format=json")
})
Convey("should store the plain response string", func() {
So(rb.PlainResponse, ShouldContainSubstring, `"title":"Database","snippet":"A <span class='searchmatch'>database</span> is an organized collection of data .`)
So(rb.PlainResponse, ShouldContainSubstring, `{"query-continue":{"search":{"sroffset":10}},"query":{"searchinfo":`)
})
Convey("should store the given struct as a the response object", func() {
log.Printf("Length word list: %+v", rb.ResponseObjectRawJson)
So(reflect.TypeOf(rb.ResponseObjectRawJson).String(), ShouldEqual, "json.RawMessage")
So(reflect.TypeOf(rb.ResponseArrayRawJson).String(), ShouldEqual, "[]json.RawMessage")
})
Convey("should Unmarschal the actual response into the response object and the first result should be ", func() {
So(response.Query.Search[0].Title, ShouldEqual, "Database")
So(len(response.Query.Search), ShouldBeGreaterThan, 0)
})
})
Convey("Testing the scraper to get a page from wikipedia", t, func() {
rb := new(scraper.RequestBit)
rb.Url = "http://en.wikipedia.org/w/api.php?rvprop=content&format=json&prop=revisions|categories&rvprop=content&action=query&titles=Yanqing_County"
rb.ResponseObjectInterface = new(requestStruct.WikiPage)
rb.Work()
response := *rb.ResponseObjectInterface.(*requestStruct.WikiPage)
Convey("should have the correct url", func() {
So(rb.Url, ShouldEqual, "http://en.wikipedia.org/w/api.php?rvprop=content&format=json&prop=revisions|categories&rvprop=content&action=query&titles=Yanqing_County")
})
Convey("should store the plain response string", func() {
So(rb.PlainResponse, ShouldNotEqual, nil)
})
Convey("should store the given struct as a the response object", func() {
So(reflect.TypeOf(response).String(), ShouldEqual, "requestStruct.WikiPage")
})
Convey("should Unmarschal the actual response into the response object", func() {
So(response.Query.Pages["2256752"].Title, ShouldEqual, "Yanqing County")
So(response.Query.Pages["2256752"].PageId, ShouldEqual, 2256752)
})
Convey("should Unmarschal the actual response into the response object and contain the wanted data", func() {
So(response.Query.Pages["2256752"].Rev[0].RawContent, ShouldContainSubstring, `name = {{raise|0.2em|Yanqing County}}`)
})
})
}
/**
* will get the content of a wikipedia page
*/
func GetWikipediaPage(firstPage string) string {
// lets create a new http request object
rb := new(scraper.RequestBit)
rb.Url = "http://en.wikipedia.org/w/api.php?rvprop=content&format=json&prop=revisions|categories&rvprop=content&action=query&titles=" + url.QueryEscape(firstPage)
glog.Infof("Url crawling in SearchWikipedia: %+v", rb.Url)
// inject the struct for the json response
rb.ResponseObjectInterface = new(requestStruct.WikiPage)
rb.Work() // fire the request
// for type assertion we need to explicite set the type of the returned interface object again
// @TODO it would be nice to work without an interface here at all, but on the other hand to be flexible on the struct
w2 := *rb.ResponseObjectInterface.(*requestStruct.WikiPage)
// as the attribute 'Pages' is a map we neet to iterate trough it and return the first result, assuming this one is the page content
for _, value := range w2.Query.Pages {
return value.Rev[0].RawContent
}
// otherwise return an empty string
return ""
}
/**
* will search wikipedia for a search term and return existing matching pages
* will be outdated soon!
*
* NOT IN USE CURRENTLY
*/
func OpenSearchWikipedia(searchTerm string) []string {
// lets create a new http request object
rb := new(scraper.RequestBit)
rb.Url = "http://en.wikipedia.org/w/api.php?action=opensearch&search=" + url.QueryEscape(searchTerm) + "&format=json&limit=3"
glog.Infof("Url crawling in SearchWikipedia: %+v", rb.Url)
rb.Work() // fire the request
// as wikipedia returns a sh*t formatted json we need to assign the result in two steps
wikiOpenSearch := new(requestStruct.WikiOpenSearch)
// first step is to assign the result term which is the first item in the returned array
if err := json.Unmarshal(rb.ResponseArrayRawJson[0], &wikiOpenSearch.SearchTerm); err != nil {
glog.Fatalf("expect string: %+v", err)
}
// second step is to assign the second item into the 'Results' array
if err := json.Unmarshal(rb.ResponseArrayRawJson[1], &wikiOpenSearch.Results); err != nil {
glog.Fatalf("expect []string: %+v", err)
}
return wikiOpenSearch.Results
}
/**
* will search wikipedia for a search term and return existing matching pages
*/
func SearchWikipedia(searchTerm string) []string {
// lets create a new http request object
rb := new(scraper.RequestBit)
rb.Url = "https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=" + url.QueryEscape(searchTerm) + "&format=json"
glog.Infof("Url crawling in SearchWikipedia: %+v", rb.Url)
// inject the struct for the json response
rb.ResponseObjectInterface = new(requestStruct.WikiSearch)
rb.Work() // fire the request
w2 := *rb.ResponseObjectInterface.(*requestStruct.WikiSearch)
var results []string
for _, value := range w2.Query.Search {
// results[len(results)] = value.Rev[0].RawContent
// http://blog.golang.org/slices
results = append(results, value.Title)
}
return results
}
