Sample code for 30+ languages & platforms
Xbase++ Requires Chilkat v11.7.0+

Box: Upload a File from BinData

See more Box Examples

Run the reusable setup once per HttpCurl object, then select names and execute the operation. The setup is repeated here only to make this published example independently runnable. Resolve documents by name using HttpCurl, then upload a small local PDF from BinData with Rest. The transfer is explicit after dependency resolution; no ID is entered by the caller.

See the Box API guide for setup and the complete workflow.

Chilkat Xbase++ Downloads

Download Chilkat for Xbase++
Xbase++ 
LOCAL nSuccess
LOCAL oCurl
LOCAL oSetupCommand
LOCAL nSetupReplacements
LOCAL cParentName
LOCAL cFolderName
LOCAL oAuthorizedCommand1
LOCAL nHeaderReplacement1
LOCAL oData
LOCAL oRest
LOCAL oOauth2
LOCAL oAttributes
LOCAL cResponseBody
LOCAL oResult

nSuccess := 0

//  Requires Chilkat 11.7.0 or later and a previously unlocked Chilkat bundle.
//  See Global Unlock Sample.
//  Guide: Box API Guide.

nSuccess := 0

//  BEGIN ONE-TIME SETUP
//  This block is repeated so each published example can run on its own.
//  In an application, run the setup example once and pass the SAME curl object
//  to operation code below. Do not recreate it for every operation.
//  See Reusable Box HttpCurl Setup.
oCurl := CreateObject("Chilkat.HttpCurl")
oCurl:SetVar("access_token", "BOX_ACCESS_TOKEN")
oCurl:SetVar("parent_name", "/")
//  Box's fixed root ID is an implementation detail; callers supply names.
oCurl:SetVar("parent_id", "0")
oSetupCommand := CreateObject("Chilkat.StringBuilder")

//  Register findParent; registration sends no request.
oSetupCommand:SetString('curl -X GET "https://api.box.com/2.0/folders/0/items?limit=1000&fields=id,type,name" -H "Authorization: Bearer ACCESS_TOKEN"')
nSetupReplacements := oSetupCommand:Replace("ACCESS_TOKEN", oCurl:GetVar("access_token"))
nSuccess := oCurl:AddFunction("findParent", oSetupCommand:GetAsString())
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

//  Register findFolder; registration sends no request.
oSetupCommand:SetString('curl -X GET "https://api.box.com/2.0/folders/{{parent_id}}/items?limit=1000&fields=id,type,name" -H "Authorization: Bearer ACCESS_TOKEN"')
nSetupReplacements := oSetupCommand:Replace("ACCESS_TOKEN", oCurl:GetVar("access_token"))
nSuccess := oCurl:AddFunction("findFolder", oSetupCommand:GetAsString())
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

//  Register findFile; registration sends no request.
oSetupCommand:SetString('curl -X GET "https://api.box.com/2.0/folders/{{folder_id}}/items?limit=1000&fields=id,type,name" -H "Authorization: Bearer ACCESS_TOKEN"')
nSetupReplacements := oSetupCommand:Replace("ACCESS_TOKEN", oCurl:GetVar("access_token"))
nSuccess := oCurl:AddFunction("findFile", oSetupCommand:GetAsString())
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

//  Register findDestination; registration sends no request.
oSetupCommand:SetString('curl -X GET "https://api.box.com/2.0/folders/0/items?limit=1000&fields=id,type,name" -H "Authorization: Bearer ACCESS_TOKEN"')
nSetupReplacements := oSetupCommand:Replace("ACCESS_TOKEN", oCurl:GetVar("access_token"))
nSuccess := oCurl:AddFunction("findDestination", oSetupCommand:GetAsString())
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

//  Register getFileDetails; registration sends no request.
oSetupCommand:SetString('curl -X GET "https://api.box.com/2.0/files/{{file_id}}?fields=id,sha1,file_version" -H "Authorization: Bearer ACCESS_TOKEN"')
nSetupReplacements := oSetupCommand:Replace("ACCESS_TOKEN", oCurl:GetVar("access_token"))
nSuccess := oCurl:AddFunction("getFileDetails", oSetupCommand:GetAsString())
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

//  Register getEnterprise; registration sends no request.
oSetupCommand:SetString('curl -X GET "https://api.box.com/2.0/users/me?fields=enterprise" -H "Authorization: Bearer ACCESS_TOKEN"')
nSetupReplacements := oSetupCommand:Replace("ACCESS_TOKEN", oCurl:GetVar("access_token"))
nSuccess := oCurl:AddFunction("getEnterprise", oSetupCommand:GetAsString())
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

//  Register output rules once. Chilkat 11.7.0 evaluates {{name}} variables
//  when extracting each output, using the current value at that time.
nSuccess := oCurl:AddOutput2("findParent", "entries", "name", "{{parent_name}}", 1, "id", "parent_id")
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

nSuccess := oCurl:AddOutput2("findFolder", "entries", "name", "{{folder_name}}", 1, "id", "folder_id")
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

nSuccess := oCurl:AddOutput2("findFile", "entries", "name", "{{file_name}}", 1, "id", "file_id")
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

nSuccess := oCurl:AddOutput2("findDestination", "entries", "name", "{{destination_name}}", 1, "id", "destination_id")
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

nSuccess := oCurl:AddOutput("getFileDetails", "file_version.id", "file_version_id")
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

nSuccess := oCurl:AddOutput("getFileDetails", "sha1", "file_sha1")
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

nSuccess := oCurl:AddOutput("getEnterprise", "enterprise.id", "enterprise_id")
IF (nSuccess != 1)
    ? oCurl:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    RETURN
ENDIF

//  END ONE-TIME SETUP
//  The name lookups below assume each listing fits in one page (1000 items).
//  Parent and destination names select root children; folder_name selects a child
//  of parent_name. "/" selects the root parent. These are not arbitrary paths.

//  BEGIN OPERATION -- keep the configured object when reusing it.
//  Inputs are names. Retain cached IDs when the selected names have not changed.
cParentName := "/"
cFolderName := "documents"
IF ((oCurl:GetVar("parent_name") != cParentName) .OR. ((cParentName == "/") .AND. (oCurl:VarDefined("parent_id") == 0)))
    oCurl:SetVar("parent_name", cParentName)
    oCurl:ClearVar("parent_id")
    oCurl:ClearVar("folder_id")
    oCurl:ClearVar("file_id")
    oCurl:ClearVar("file_version_id")
    oCurl:ClearVar("file_sha1")
    IF (cParentName == "/")
        oCurl:SetVar("parent_id", "0")
    ENDIF

ENDIF

IF (oCurl:GetVar("folder_name") != cFolderName)
    oCurl:SetVar("folder_name", cFolderName)
    oCurl:ClearVar("folder_id")
    oCurl:ClearVar("file_id")
    oCurl:ClearVar("file_version_id")
    oCurl:ClearVar("file_sha1")
ENDIF

//  Resolve the named destination first. HttpCurl does not expand variables
//  inside multipart -F attributes in the tested build, so this upload is two phases.
oCurl:ClearTargetOutput("*")
oAuthorizedCommand1 := CreateObject("Chilkat.StringBuilder")
oAuthorizedCommand1:SetString('curl -X GET "https://api.box.com/2.0/folders/{{folder_id}}?fields=id" -H "Authorization: Bearer {{access_token}}"')
nHeaderReplacement1 := oAuthorizedCommand1:Replace("{{access_token}}", oCurl:GetVar("access_token"))
nSuccess := oCurl:DoYourThing(oAuthorizedCommand1:GetAsString())
IF ((nSuccess != 1) .OR. (oCurl:StatusCode != 200))
    ? "Box request failed. HTTP status: " + Str(oCurl:StatusCode)
    ? "Failure reason: " + Str(oCurl:FailReason)
    ? oCurl:ResponseBodyStr
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    RETURN
ENDIF

oData := CreateObject("Chilkat.BinData")
nSuccess := oData:LoadFile("qa_data/pdf/invoice.pdf")
IF (nSuccess != 1)
    ? oData:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    RETURN
ENDIF

oRest := CreateObject("Chilkat.Rest")
oOauth2 := CreateObject("Chilkat.OAuth2")
oOauth2:AccessToken := oCurl:GetVar("access_token")
nSuccess := oRest:SetAuthOAuth2(oOauth2)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    RETURN
ENDIF

nSuccess := oRest:Connect("upload.box.com", 443, 1, 1)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    RETURN
ENDIF

oAttributes := CreateObject("Chilkat.JsonObject")
oAttributes:UpdateString("name", "invoice.pdf")
oAttributes:UpdateString("parent.id", oCurl:GetVar("folder_id"))
nSuccess := oRest:AddHeader("Content-Type", "multipart/form-data")
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

oRest:PartSelector := "1"
nSuccess := oRest:AddHeader("Content-Disposition", 'form-data; name="attributes"')
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

nSuccess := oRest:SetMultipartBodyString(oAttributes:Emit())
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

oRest:PartSelector := "2"
nSuccess := oRest:AddHeader("Content-Disposition", 'form-data; name="file"; filename="invoice.pdf"')
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

nSuccess := oRest:AddHeader("Content-Type", "application/pdf")
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

nSuccess := oRest:SetMultipartBodyBd(oData)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

oRest:PartSelector := "0"
cResponseBody := oRest:FullRequestMultipart("POST", "/api/2.0/files/content")
IF (oRest:LastMethodSuccess != 1)
    ? oRest:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

IF (oRest:ResponseStatusCode != 201)
    ? "Upload failed: " + Str(oRest:ResponseStatusCode)
    ? cResponseBody
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    RETURN
ENDIF

oResult := CreateObject("Chilkat.JsonObject")
nSuccess := oResult:Load(cResponseBody)
IF (nSuccess != 1)
    ? oResult:LastErrorText
    oCurl:destroy()
    oSetupCommand:destroy()
    oAuthorizedCommand1:destroy()
    oData:destroy()
    oRest:destroy()
    oOauth2:destroy()
    oAttributes:destroy()
    oResult:destroy()
    RETURN
ENDIF

? "Uploaded file ID: " + oResult:StringOf("entries[0].id")
oCurl:SetVar("file_name", "invoice.pdf")
oCurl:SetVar("file_id", oResult:StringOf("entries[0].id"))
oCurl:ClearVar("file_version_id")
oCurl:ClearVar("file_sha1")

oCurl:destroy()
oSetupCommand:destroy()
oAuthorizedCommand1:destroy()
oData:destroy()
oRest:destroy()
oOauth2:destroy()
oAttributes:destroy()
oResult:destroy()