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https://github.com/geziyor/geziyor
Geziyor, blazing fast web crawling & scraping framework for Go. Supports JS rendering.
https://github.com/geziyor/geziyor
crawler go scraper scraping spider
Last synced: 7 days ago
JSON representation
Geziyor, blazing fast web crawling & scraping framework for Go. Supports JS rendering.
- Host: GitHub
- URL: https://github.com/geziyor/geziyor
- Owner: geziyor
- License: mpl-2.0
- Created: 2019-06-06T14:08:48.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2024-08-12T06:15:56.000Z (3 months ago)
- Last Synced: 2024-10-16T14:05:10.521Z (20 days ago)
- Topics: crawler, go, scraper, scraping, spider
- Language: Go
- Homepage:
- Size: 256 KB
- Stars: 2,610
- Watchers: 43
- Forks: 149
- Open Issues: 26
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE.txt
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README
# Geziyor
Geziyor is a blazing fast web crawling and web scraping framework. It can be used to crawl websites and extract structured data from them. Geziyor is useful for a wide range of purposes such as data mining, monitoring and automated testing.
[](https://godoc.org/github.com/geziyor/geziyor)
[](http://goreportcard.com/report/geziyor/geziyor)
[](https://codecov.io/github/geziyor/geziyor?branch=master)
## Features
- **JS Rendering**
- 5.000+ Requests/Sec
- Caching (Memory/Disk/LevelDB)
- Automatic Data Exporting (JSON, CSV, or custom)
- Metrics (Prometheus, Expvar, or custom)
- Limit Concurrency (Global/Per Domain)
- Request Delays (Constant/Randomized)
- Cookies, Middlewares, robots.txt
- Automatic response decoding to UTF-8
- Proxy management (Single, Round-Robin, Custom)
See scraper [Options](https://godoc.org/github.com/geziyor/geziyor#Options) for all custom settings.
## Status
We highly recommend you to use Geziyor with go modules.
## Usage
This example extracts all quotes from *quotes.toscrape.com* and exports to JSON file.
```go
func main() {
geziyor.NewGeziyor(&geziyor.Options{
StartURLs: []string{"http://quotes.toscrape.com/"},
ParseFunc: quotesParse,
Exporters: []export.Exporter{&export.JSON{}},
}).Start()
}
func quotesParse(g *geziyor.Geziyor, r *client.Response) {
r.HTMLDoc.Find("div.quote").Each(func(i int, s *goquery.Selection) {
g.Exports <- map[string]interface{}{
"text": s.Find("span.text").Text(),
"author": s.Find("small.author").Text(),
}
})
if href, ok := r.HTMLDoc.Find("li.next > a").Attr("href"); ok {
g.Get(r.JoinURL(href), quotesParse)
}
}
```
See [tests](https://github.com/geziyor/geziyor/blob/master/geziyor_test.go) for more usage examples.
## Documentation
### Installation
go get -u github.com/geziyor/geziyor
If you want to make JS rendered requests, make sure you have Chrome installed.
**NOTE**: macOS limits the maximum number of open file descriptors.
If you want to make concurrent requests over 256, you need to increase limits.
Read [this](https://wilsonmar.github.io/maximum-limits/) for more.
### Making Normal Requests
Initial requests start with ```StartURLs []string``` field in ```Options```.
Geziyor makes concurrent requests to those URLs.
After reading response, ```ParseFunc func(g *Geziyor, r *Response)``` called.
```go
geziyor.NewGeziyor(&geziyor.Options{
StartURLs: []string{"http://api.ipify.org"},
ParseFunc: func(g *geziyor.Geziyor, r *client.Response) {
fmt.Println(string(r.Body))
},
}).Start()
```
If you want to manually create first requests, set ```StartRequestsFunc```.
```StartURLs``` won't be used if you create requests manually.
You can make requests using ```Geziyor``` [methods](https://godoc.org/github.com/geziyor/geziyor#Geziyor):
```go
geziyor.NewGeziyor(&geziyor.Options{
StartRequestsFunc: func(g *geziyor.Geziyor) {
g.Get("https://httpbin.org/anything", g.Opt.ParseFunc)
g.Head("https://httpbin.org/anything", g.Opt.ParseFunc)
},
ParseFunc: func(g *geziyor.Geziyor, r *client.Response) {
fmt.Println(string(r.Body))
},
}).Start()
```
### Making JS Rendered Requests
JS Rendered requests can be made using ```GetRendered``` method.
By default, geziyor uses local Chrome application CLI to start Chrome browser. Set ```BrowserEndpoint``` option to use different chrome instance. Such as, "ws://localhost:3000"
```go
geziyor.NewGeziyor(&geziyor.Options{
StartRequestsFunc: func(g *geziyor.Geziyor) {
g.GetRendered("https://httpbin.org/anything", g.Opt.ParseFunc)
},
ParseFunc: func(g *geziyor.Geziyor, r *client.Response) {
fmt.Println(string(r.Body))
},
//BrowserEndpoint: "ws://localhost:3000",
}).Start()
```
### Extracting Data
We can extract HTML elements using ```response.HTMLDoc```. HTMLDoc is Goquery's [Document](https://godoc.org/github.com/PuerkitoBio/goquery#Document).
HTMLDoc can be accessible on Response if response is HTML and can be parsed using Go's built-in HTML [parser](https://godoc.org/golang.org/x/net/html#Parse)
If response isn't HTML, ```response.HTMLDoc``` would be ```nil```.
```go
geziyor.NewGeziyor(&geziyor.Options{
StartURLs: []string{"http://quotes.toscrape.com/"},
ParseFunc: func(g *geziyor.Geziyor, r *client.Response) {
r.HTMLDoc.Find("div.quote").Each(func(_ int, s *goquery.Selection) {
log.Println(s.Find("span.text").Text(), s.Find("small.author").Text())
})
},
}).Start()
```
### Exporting Data
You can export data automatically using exporters. Just send data to ```Geziyor.Exports``` chan.
[Available exporters](https://godoc.org/github.com/geziyor/geziyor/export)
```go
geziyor.NewGeziyor(&geziyor.Options{
StartURLs: []string{"http://quotes.toscrape.com/"},
ParseFunc: func(g *geziyor.Geziyor, r *client.Response) {
r.HTMLDoc.Find("div.quote").Each(func(_ int, s *goquery.Selection) {
g.Exports <- map[string]interface{}{
"text": s.Find("span.text").Text(),
"author": s.Find("small.author").Text(),
}
})
},
Exporters: []export.Exporter{&export.JSON{}},
}).Start()
```
### Custom Requests - Passing Metadata To Callbacks
You can create custom requests with ```client.NewRequest```
Use that request on ```geziyor.Do(request, callback)```
```go
geziyor.NewGeziyor(&geziyor.Options{
StartRequestsFunc: func(g *geziyor.Geziyor) {
req, _ := client.NewRequest("GET", "https://httpbin.org/anything", nil)
req.Meta["key"] = "value"
g.Do(req, g.Opt.ParseFunc)
},
ParseFunc: func(g *geziyor.Geziyor, r *client.Response) {
fmt.Println("This is our data from request: ", r.Request.Meta["key"])
},
}).Start()
```
### Proxy - Use proxy per request
If you want to use proxy for your requests, and you have 1 proxy, you can just set these env values:
`HTTP_PROXY`
`HTTPS_PROXY`
And geziyor will use those proxies.
Also, you can use in-order proxy per request by setting `ProxyFunc` option to `client.RoundRobinProxy`
Or any custom proxy selection function that you want. See `client/proxy.go` on how to implement that kind of custom proxy selection function.
Proxies can be HTTP, HTTPS and SOCKS5.
Note: If you use `http` scheme for proxy, It'll be used for http requests and not for https requests.
```go
geziyor.NewGeziyor(&geziyor.Options{
StartURLs: []string{"http://httpbin.org/anything"},
ParseFunc: parseFunc,
ProxyFunc: client.RoundRobinProxy("http://some-http-proxy.com", "https://some-https-proxy.com", "socks5://some-socks5-proxy.com"),
}).Start()
```
## Benchmark
**8748 request per seconds** on *Macbook Pro 15" 2016*
See [tests](https://github.com/geziyor/geziyor/blob/master/geziyor_test.go) for this benchmark function:
```bash
>> go test -run none -bench Requests -benchtime 10s
goos: darwin
goarch: amd64
pkg: github.com/geziyor/geziyor
BenchmarkRequests-8 200000 108710 ns/op
PASS
ok github.com/geziyor/geziyor 22.861s
```