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feat: complete getting notice info (#19)
* complete getting notice info * add NoticeInfoReq to get noticeInfo * fix getting the first page error * fix getting the first page error * fix code according to ci * add judgement for page num request * fix accroding to ci test * fix according copilot
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| Copyright 2024 The west2-online Authors. | ||
| 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 jwch | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/antchfx/htmlquery" | ||
| "golang.org/x/net/html" | ||
|
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| "github.com/west2-online/jwch/constants" | ||
| ) | ||
|
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| func (s *Student) GetNoticeInfo(req *NoticeInfoReq) (list []*NoticeInfo, err error) { | ||
| // 获取通知公告页面的总页数 | ||
| res, err := s.PostWithIdentifier(constants.NoticeInfoQueryURL, map[string]string{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| // 首页直接爬取 | ||
| if req.PageNum == 1 { | ||
| list, err = parseNoticeInfo(res) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return list, nil | ||
| } | ||
| // 分页需要根据页数计算 url | ||
| lastPageNum, err := getTotalPages(res) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| // 判断是否超出总页数 | ||
| if req.PageNum > lastPageNum { | ||
| return nil, fmt.Errorf("超出总页数") | ||
| } | ||
| // 根据总页数计算 url | ||
| num := lastPageNum - req.PageNum + 1 | ||
| url := fmt.Sprintf("https://jwch.fzu.edu.cn/jxtz/%d.htm", num) | ||
| doc, err := s.PostWithIdentifier(url, map[string]string{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| list, err = parseNoticeInfo(doc) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| // 3. 返回结果 | ||
| return list, nil | ||
| } | ||
|
|
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| // 获取当前页面的所有数据信息 | ||
| func parseNoticeInfo(doc *html.Node) ([]*NoticeInfo, error) { | ||
| // 解析通知公告页面 | ||
| var list []*NoticeInfo | ||
|
|
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| sel := htmlquery.FindOne(doc, "//div[@class='box-gl clearfix']") | ||
| if sel == nil { | ||
| return nil, fmt.Errorf("cannot find the notice list") | ||
| } | ||
|
|
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| rows := htmlquery.Find(sel, ".//ul[@class='list-gl']/li") | ||
|
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| for _, row := range rows { | ||
| // 提取日期 | ||
| dateNode := htmlquery.FindOne(row, ".//span[@class='doclist_time']") | ||
| if dateNode == nil { | ||
| return nil, fmt.Errorf("cannot find the date") | ||
| } | ||
| date := strings.TrimSpace(htmlquery.InnerText(dateNode)) | ||
|
|
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| // 提取标题 | ||
| titleNode := htmlquery.FindOne(row, ".//a") | ||
|
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| title := strings.TrimSpace(htmlquery.SelectAttr(titleNode, "title")) | ||
|
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| // 提取 URL | ||
| url := strings.TrimSpace(htmlquery.SelectAttr(titleNode, "href")) | ||
| url = constants.JwchNoticeURLPrefix + url | ||
|
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| noticeInfo := &NoticeInfo{ | ||
| Title: title, | ||
| URL: url, | ||
| Date: date, | ||
| } | ||
| list = append(list, noticeInfo) | ||
| } | ||
|
|
||
| return list, nil | ||
| } | ||
|
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| // 获取总页数 | ||
| func getTotalPages(doc *html.Node) (int, error) { | ||
| totalPagesNode := htmlquery.FindOne(doc, "//span[@class='p_pages']//a[@href='jxtz/1.htm']") | ||
| if totalPagesNode == nil { | ||
| return 0, fmt.Errorf("未找到总页数") | ||
| } | ||
|
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| totalPagesStr := htmlquery.InnerText(totalPagesNode) | ||
| var totalPages int | ||
| _, err := fmt.Sscanf(totalPagesStr, "%d", &totalPages) | ||
| if err != nil { | ||
| return 0, fmt.Errorf("解析总页数失败: %v", err) | ||
| } | ||
| return totalPages, nil | ||
| } |