无效的指针

[Sunmimy]

直接运行启动后, 点击搜索....
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x40 pc=0x81cc2f]

goroutine 23 [running]:
main.httpDo(0x936aa5, 0x3, 0xc0002a80c0, 0x59, 0x0, 0x0)
D:/gopath/src/BlogSearch/BlogSearch.go:674 +0x37f
main.getjuejinList(0xc000255000, 0x6, 0x94bd84, 0x1, 0xdd3de0, 0x0, 0x0)
D:/gopath/src/BlogSearch/BlogSearch.go:786 +0xe6
main.(*MyMainWindow).GetList.func3(0xc000255000, 0x6, 0x1, 0xc0001262c0)
D:/gopath/src/BlogSearch/BlogSearch.go:372 +0xbd
created by main.(*MyMainWindow).GetList
D:/gopath/src/BlogSearch/BlogSearch.go:370 +0x411