Golang pagination.NewPager函数代码示例

func createMarkerPaged(t *testing.T) pagination.Pager {
	testhelper.SetupHTTP()

	testhelper.Mux.HandleFunc("/page", func(w http.ResponseWriter, r *http.Request) {
		r.ParseForm()
		ms := r.Form["marker"]
		switch {
		case len(ms) == 0:
			fmt.Fprintf(w, "aaa\nbbb\nccc")
		case len(ms) == 1 && ms[0] == "ccc":
			fmt.Fprintf(w, "ddd\neee\nfff")
		case len(ms) == 1 && ms[0] == "fff":
			fmt.Fprintf(w, "ggg\nhhh\niii")
		case len(ms) == 1 && ms[0] == "iii":
			w.WriteHeader(http.StatusNoContent)
		default:
			t.Errorf("Request with unexpected marker: [%v]", ms)
		}
	})

	client := createClient()

	createPage := func(r pagination.PageResult) pagination.Page {
		p := MarkerPageResult{pagination.MarkerPageBase{PageResult: r}}
		p.MarkerPageBase.Owner = p
		return p
	}

	return pagination.NewPager(client, testhelper.Server.URL+"/page", createPage)
}

func createLinked(t *testing.T) pagination.Pager {
	testhelper.SetupHTTP()

	testhelper.Mux.HandleFunc("/page1", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Add("Content-Type", "application/json")
		fmt.Fprintf(w, `{ "ints": [1, 2, 3], "links": { "next": "%s/page2" } }`, testhelper.Server.URL)
	})

	testhelper.Mux.HandleFunc("/page2", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Add("Content-Type", "application/json")
		fmt.Fprintf(w, `{ "ints": [4, 5, 6], "links": { "next": "%s/page3" } }`, testhelper.Server.URL)
	})

	testhelper.Mux.HandleFunc("/page3", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Add("Content-Type", "application/json")
		fmt.Fprintf(w, `{ "ints": [7, 8, 9], "links": { "next": null } }`)
	})

	client := createClient()

	createPage := func(r pagination.PageResult) pagination.Page {
		return LinkedPageResult{pagination.LinkedPageBase{PageResult: r}}
	}

	return pagination.NewPager(client, testhelper.Server.URL+"/page1", createPage)
}

// List returns a Pager which allows you to iterate over a collection of
// floating IP resources. It accepts a ListOpts struct, which allows you to
// filter and sort the returned collection for greater efficiency.
func List(c *gophercloud.ServiceClient, opts ListOpts) pagination.Pager {
	q, err := gophercloud.BuildQueryString(&opts)
	if err != nil {
		return pagination.Pager{Err: err}
	}
	u := rootURL(c) + q.String()
	return pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
		return FloatingIPPage{pagination.LinkedPageBase{PageResult: r}}
	})
}

// List makes a request against the API to list resources for the given stack.
func List(client *gophercloud.ServiceClient, stackName, stackID string, opts ListOptsBuilder) pagination.Pager {
	url := listURL(client, stackName, stackID)
	if opts != nil {
		query, err := opts.ToStackResourceListQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}
	return pagination.NewPager(client, url, func(r pagination.PageResult) pagination.Page {
		return ResourcePage{pagination.SinglePageBase(r)}
	})
}

// List returns Snapshots optionally limited by the conditions provided in
// ListOpts.
func List(client *gophercloud.ServiceClient, opts ListOptsBuilder) pagination.Pager {
	url := listURL(client)
	if opts != nil {
		query, err := opts.ToSnapshotListQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}
	return pagination.NewPager(client, url, func(r pagination.PageResult) pagination.Page {
		return SnapshotPage{pagination.SinglePageBase(r)}
	})
}

// ListMembers returns a Pager which allows you to iterate over a collection of
// members. It accepts a ListMembersOptsBuilder, which allows you to filter and sort
// the returned collection for greater efficiency.
//
// Default policy settings return only those members that are owned by the
// tenant who submits the request, unless an admin user submits the request.
func ListMembers(c *gophercloud.ServiceClient, poolID string, opts ListMembersOptsBuilder) pagination.Pager {
	url := memberRootURL(c, poolID)
	if opts != nil {
		query, err := opts.ToMembersListQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}
	return pagination.NewPager(c, url, func(r pagination.PageResult) pagination.Page {
		return MemberPage{pagination.LinkedPageBase{PageResult: r}}
	})
}

// List enumerates the services available to a specific user.
func List(client *gophercloud.ServiceClient, opts ListOptsBuilder) pagination.Pager {
	u := listURL(client)
	if opts != nil {
		q, err := opts.ToServiceListMap()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		u += q
	}
	return pagination.NewPager(client, u, func(r pagination.PageResult) pagination.Page {
		return ServicePage{pagination.LinkedPageBase{PageResult: r}}
	})
}

// List implements image list request
func List(c *gophercloud.ServiceClient, opts ListOptsBuilder) pagination.Pager {
	url := listURL(c)
	if opts != nil {
		query, err := opts.ToImageListQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}
	return pagination.NewPager(c, url, func(r pagination.PageResult) pagination.Page {
		return ImagePage{pagination.LinkedPageBase{PageResult: r}}
	})
}

// ListAssignments enumerates the roles assigned to a specified resource.
func ListAssignments(client *gophercloud.ServiceClient, opts ListAssignmentsOptsBuilder) pagination.Pager {
	url := listAssignmentsURL(client)
	if opts != nil {
		query, err := opts.ToRolesListAssignmentsQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}
	return pagination.NewPager(client, url, func(r pagination.PageResult) pagination.Page {
		return RoleAssignmentPage{pagination.LinkedPageBase{PageResult: r}}
	})
}

// ListResourceEvents makes a request against the API to list resources for the given stack.
func ListResourceEvents(client *gophercloud.ServiceClient, stackName, stackID, resourceName string, opts ListResourceEventsOptsBuilder) pagination.Pager {
	url := listResourceEventsURL(client, stackName, stackID, resourceName)
	if opts != nil {
		query, err := opts.ToResourceEventListQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}
	return pagination.NewPager(client, url, func(r pagination.PageResult) pagination.Page {
		p := EventPage{pagination.MarkerPageBase{PageResult: r}}
		p.MarkerPageBase.Owner = p
		return p
	})
}

func setupSinglePaged() pagination.Pager {
	testhelper.SetupHTTP()
	client := createClient()

	testhelper.Mux.HandleFunc("/only", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Add("Content-Type", "application/json")
		fmt.Fprintf(w, `{ "ints": [1, 2, 3] }`)
	})

	createPage := func(r pagination.PageResult) pagination.Page {
		return SinglePageResult{pagination.SinglePageBase(r)}
	}

	return pagination.NewPager(client, testhelper.Server.URL+"/only", createPage)
}

// List returns a Pager which allows you to iterate over a collection of
// CDN services. It accepts a ListOpts struct, which allows for pagination via
// marker and limit.
func List(c *gophercloud.ServiceClient, opts ListOptsBuilder) pagination.Pager {
	url := listURL(c)
	if opts != nil {
		query, err := opts.ToCDNServiceListQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}
	return pagination.NewPager(c, url, func(r pagination.PageResult) pagination.Page {
		p := ServicePage{pagination.MarkerPageBase{PageResult: r}}
		p.MarkerPageBase.Owner = p
		return p
	})
}

// ListDetail returns ShareNetworks optionally limited by the conditions provided in ListOpts.
func ListDetail(client *gophercloud.ServiceClient, opts ListOptsBuilder) pagination.Pager {
	url := listDetailURL(client)
	if opts != nil {
		query, err := opts.ToShareNetworkListQuery()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query
	}

	return pagination.NewPager(client, url, func(r pagination.PageResult) pagination.Page {
		p := ShareNetworkPage{pagination.MarkerPageBase{PageResult: r}}
		p.MarkerPageBase.Owner = p
		return p
	})
}

// List is a function that retrieves all objects in a container. It also returns the details
// for the container. To extract only the object information or names, pass the ListResult
// response to the ExtractInfo or ExtractNames function, respectively.
func List(c *gophercloud.ServiceClient, containerName string, opts ListOptsBuilder) pagination.Pager {
	headers := map[string]string{"Accept": "text/plain", "Content-Type": "text/plain"}

	url := listURL(c, containerName)
	if opts != nil {
		full, query, err := opts.ToObjectListParams()
		if err != nil {
			return pagination.Pager{Err: err}
		}
		url += query

		if full {
			headers = map[string]string{"Accept": "application/json", "Content-Type": "application/json"}
		}
	}

	pager := pagination.NewPager(c, url, func(r pagination.PageResult) pagination.Page {
		p := ObjectPage{pagination.MarkerPageBase{PageResult: r}}
		p.MarkerPageBase.Owner = p
		return p
	})
	pager.Headers = headers
	return pager
}

// ListAddressesByNetwork makes a request against the API to list the servers IP addresses
// for the given network.
func ListAddressesByNetwork(client *gophercloud.ServiceClient, id, network string) pagination.Pager {
	return pagination.NewPager(client, listAddressesByNetworkURL(client, id, network), func(r pagination.PageResult) pagination.Page {
		return NetworkAddressPage{pagination.SinglePageBase(r)}
	})
}